66692912 has 80 divisors (see below), whose sum is σ = 153823488. Its totient is φ = 27613440.

The previous prime is 66692863. The next prime is 66692929. The reversal of 66692912 is 21929666.

It is a super-2 number, since 2×66692912² = 8895889022079488, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66692912.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 235523 + ... + 235805.

Almost surely, 2^66692912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66692912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76911744).

66692912 is an abundant number, since it is smaller than the sum of its proper divisors (87130576).

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

66692912 is a wasteful number, since it uses less digits than its factorization.

66692912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418 (or 412 counting only the distinct ones).

The product of its digits is 69984, while the sum is 41.

The square root of 66692912 is about 8166.5728429985. The cubic root of 66692912 is about 405.5333358635.

The spelling of 66692912 in words is "sixty-six million, six hundred ninety-two thousand, nine hundred twelve".