669606782760 has 96 divisors (see below), whose sum is σ = 2304235126440. Its totient is φ = 168058171392.

The previous prime is 669606782759. The next prime is 669606782783. The reversal of 669606782760 is 67287606966.

It can be written as a sum of positive squares in 4 ways, for example, as 571508784324 + 98097998436 = 755982^2 + 313206^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54700317 + ... + 54712556.

Almost surely, 2^669606782760 is an apocalyptic number.

669606782760 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

669606782760 is an abundant number, since it is smaller than the sum of its proper divisors (1634628343680).

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

669606782760 is a wasteful number, since it uses less digits than its factorization.

669606782760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109412907 (or 109412900 counting only the distinct ones).

The product of its (nonzero) digits is 54867456, while the sum is 63.

The spelling of 669606782760 in words is "six hundred sixty-nine billion, six hundred six million, seven hundred eighty-two thousand, seven hundred sixty".