72061656 has 32 divisors (see below), whose sum is σ = 183211200. Its totient is φ = 23612960.

The previous prime is 72061643. The next prime is 72061673. The reversal of 72061656 is 65616027.

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, 24030 + ... + 26861.

It is an arithmetic number, because the mean of its divisors is an integer number (5725350).

Almost surely, 2^72061656 is an apocalyptic number.

It is an amenable number.

72061656 is an abundant number, since it is smaller than the sum of its proper divisors (111149544).

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

72061656 is a wasteful number, since it uses less digits than its factorization.

72061656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50959 (or 50955 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 72061656 is about 8488.9137114239. The cubic root of 72061656 is about 416.1354804043.

The spelling of 72061656 in words is "seventy-two million, sixty-one thousand, six hundred fifty-six".