65567920 has 40 divisors (see below), whose sum is σ = 166306320. Its totient is φ = 23842560.

The previous prime is 65567899. The next prime is 65567921. The reversal of 65567920 is 2976556.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (65567921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36375 + ... + 38134.

It is an arithmetic number, because the mean of its divisors is an integer number (4157658).

Almost surely, 2^65567920 is an apocalyptic number.

It is an amenable number.

65567920 is an abundant number, since it is smaller than the sum of its proper divisors (100738400).

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

65567920 is a wasteful number, since it uses less digits than its factorization.

65567920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74533 (or 74527 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 40.

The square root of 65567920 is about 8097.4020525104. The cubic root of 65567920 is about 403.2401821779.

The spelling of 65567920 in words is "sixty-five million, five hundred sixty-seven thousand, nine hundred twenty".