64566156 has 24 divisors (see below), whose sum is σ = 153861120. Its totient is φ = 21063952.

The previous prime is 64566133. The next prime is 64566157. The reversal of 64566156 is 65166546.

It is not an unprimeable number, because it can be changed into a prime (64566157) 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, 56676 + ... + 57803.

It is an arithmetic number, because the mean of its divisors is an integer number (6410880).

Almost surely, 2^64566156 is an apocalyptic number.

It is an amenable number.

64566156 is an abundant number, since it is smaller than the sum of its proper divisors (89294964).

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

64566156 is a wasteful number, since it uses less digits than its factorization.

64566156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114533 (or 114531 counting only the distinct ones).

The product of its digits is 129600, while the sum is 39.

The square root of 64566156 is about 8035.3068391941. The cubic root of 64566156 is about 401.1760306578.

It can be divided in two parts, 6456615 and 6, that added together give a triangular number (6456621 = T₃₅₉₃).

The spelling of 64566156 in words is "sixty-four million, five hundred sixty-six thousand, one hundred fifty-six".