66791064 has 32 divisors (see below), whose sum is σ = 167454720. Its totient is φ = 22200096.

The previous prime is 66791059. The next prime is 66791093. The reversal of 66791064 is 46019766.

It is a super-2 number, since 2×66791064² = 8922092460504192, which contains 22 as substring.

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, 5017 + ... + 12599.

It is an arithmetic number, because the mean of its divisors is an integer number (5232960).

Almost surely, 2^66791064 is an apocalyptic number.

It is an amenable number.

66791064 is an abundant number, since it is smaller than the sum of its proper divisors (100663656).

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

66791064 is a wasteful number, since it uses less digits than its factorization.

66791064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7959 (or 7955 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 66791064 is about 8172.5800087855. The cubic root of 66791064 is about 405.7321795699.

The spelling of 66791064 in words is "sixty-six million, seven hundred ninety-one thousand, sixty-four".