666094622400 has 840 divisors, whose sum is σ = 2502465546240. Its totient is φ = 173746944000.

The previous prime is 666094622383. The next prime is 666094622443. The reversal of 666094622400 is 4226490666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 1757505411 + ... + 1757505789.

Almost surely, 2^666094622400 is an apocalyptic number.

666094622400 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666094622400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1251232773120).

666094622400 is an abundant number, since it is smaller than the sum of its proper divisors (1836370923840).

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

666094622400 is a wasteful number, since it uses less digits than its factorization.

666094622400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675 (or 651 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 45.

The spelling of 666094622400 in words is "six hundred sixty-six billion, ninety-four million, six hundred twenty-two thousand, four hundred".