65640760 has 32 divisors (see below), whose sum is σ = 148346640. Its totient is φ = 26139904.

The previous prime is 65640749. The next prime is 65640787. The reversal of 65640760 is 6704656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5799 + ... + 12841.

Almost surely, 2^65640760 is an apocalyptic number.

It is an amenable number.

65640760 is an abundant number, since it is smaller than the sum of its proper divisors (82705880).

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

65640760 is a wasteful number, since it uses less digits than its factorization.

65640760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7287 (or 7283 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 65640760 is about 8101.8985429342. The cubic root of 65640760 is about 403.3894479826.

The spelling of 65640760 in words is "sixty-five million, six hundred forty thousand, seven hundred sixty".