64695992 has 8 divisors (see below), whose sum is σ = 121305000. Its totient is φ = 32347992.

The previous prime is 64695979. The next prime is 64696057. The reversal of 64695992 is 29959646.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 64695992.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4043492 + ... + 4043507.

It is an arithmetic number, because the mean of its divisors is an integer number (15163125).

Almost surely, 2^64695992 is an apocalyptic number.

It is an amenable number.

64695992 is a deficient number, since it is larger than the sum of its proper divisors (56609008).

64695992 is a wasteful number, since it uses less digits than its factorization.

64695992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8087005 (or 8087001 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 50.

The square root of 64695992 is about 8043.3818758032. The cubic root of 64695992 is about 401.4447587312. Note that the first 3 decimals are identical.

The spelling of 64695992 in words is "sixty-four million, six hundred ninety-five thousand, nine hundred ninety-two".