670446540864 has 189 divisors, whose sum is σ = 1945722408903. Its totient is φ = 220724434944.

The previous prime is 670446540857. The next prime is 670446540871. The reversal of 670446540864 is 468045644076.

It is a happy number.

The square root of 670446540864 is 818808.

It is a perfect power (a square), and thus also a powerful number.

670446540864 is a `hidden beast` number, since 6 + 70 + 446 + 54 + 0 + 86 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (670446540857) and next prime (670446540871).

It can be written as a sum of positive squares in 4 ways, for example, as 155772302400 + 514674238464 = 394680^2 + 717408^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 670446540864.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2142001572 + ... + 2142001884.

Almost surely, 2^670446540864 is an apocalyptic number.

670446540864 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

670446540864 is the 818808-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 670446540864

670446540864 is an abundant number, since it is smaller than the sum of its proper divisors (1275275868039).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

670446540864 is an equidigital number, since it uses as much as digits as its factorization.

670446540864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862 (or 427 counting only the distinct ones).

The product of its (nonzero) digits is 15482880, while the sum is 54.

The spelling of 670446540864 in words is "six hundred seventy billion, four hundred forty-six million, five hundred forty thousand, eight hundred sixty-four".