66512888 has 16 divisors (see below), whose sum is σ = 134305080. Its totient is φ = 30698208.

The previous prime is 66512881. The next prime is 66512899. The reversal of 66512888 is 88821566.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66512881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319670 + ... + 319877.

Almost surely, 2^66512888 is an apocalyptic number.

It is an amenable number.

66512888 is an abundant number, since it is smaller than the sum of its proper divisors (67792192).

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

66512888 is a wasteful number, since it uses less digits than its factorization.

66512888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639566 (or 639562 counting only the distinct ones).

The product of its digits is 184320, while the sum is 44.

The square root of 66512888 is about 8155.5433908477. The cubic root of 66512888 is about 405.1681220408.

The spelling of 66512888 in words is "sixty-six million, five hundred twelve thousand, eight hundred eighty-eight".