65640992466 has 32 divisors (see below), whose sum is σ = 150057953280. Its totient is φ = 18751894416.

The previous prime is 65640992447. The next prime is 65640992489. The reversal of 65640992466 is 66429904656.

It is a happy number.

It is a super-2 number, since 2×65640992466² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 196545 + ... + 412203.

It is an arithmetic number, because the mean of its divisors is an integer number (4689311040).

Almost surely, 2^65640992466 is an apocalyptic number.

65640992466 is an abundant number, since it is smaller than the sum of its proper divisors (84416960814).

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

65640992466 is a wasteful number, since it uses less digits than its factorization.

65640992466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222918.

The product of its (nonzero) digits is 16796160, while the sum is 57.

The spelling of 65640992466 in words is "sixty-five billion, six hundred forty million, nine hundred ninety-two thousand, four hundred sixty-six".