65641956 has 12 divisors (see below), whose sum is σ = 153164592. Its totient is φ = 21880648.

The previous prime is 65641897. The next prime is 65641957. The reversal of 65641956 is 65914656.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (65641957) 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, 2735070 + ... + 2735093.

It is an arithmetic number, because the mean of its divisors is an integer number (12763716).

Almost surely, 2^65641956 is an apocalyptic number.

It is an amenable number.

65641956 is an abundant number, since it is smaller than the sum of its proper divisors (87522636).

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

65641956 is a wasteful number, since it uses less digits than its factorization.

65641956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5470170 (or 5470168 counting only the distinct ones).

The product of its digits is 194400, while the sum is 42.

The square root of 65641956 is about 8101.9723524584. The cubic root of 65641956 is about 403.3918979383.

The spelling of 65641956 in words is "sixty-five million, six hundred forty-one thousand, nine hundred fifty-six".