65973680 has 20 divisors (see below), whose sum is σ = 153388992. Its totient is φ = 26389440.

The previous prime is 65973679. The next prime is 65973689. The reversal of 65973680 is 8637956.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (65973689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 412256 + ... + 412415.

Almost surely, 2^65973680 is an apocalyptic number.

It is an amenable number.

65973680 is an abundant number, since it is smaller than the sum of its proper divisors (87415312).

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

65973680 is a wasteful number, since it uses less digits than its factorization.

65973680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824684 (or 824678 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 65973680 is about 8122.4183590849. The cubic root of 65973680 is about 404.0702750018.

The spelling of 65973680 in words is "sixty-five million, nine hundred seventy-three thousand, six hundred eighty".