66012636 has 24 divisors (see below), whose sum is σ = 154295680. Its totient is φ = 21966192.

The previous prime is 66012623. The next prime is 66012641. The reversal of 66012636 is 63621066.

It is a super-2 number, since 2×66012636² = 8715336223336992, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2985 + ... + 11871.

Almost surely, 2^66012636 is an apocalyptic number.

It is an amenable number.

66012636 is an abundant number, since it is smaller than the sum of its proper divisors (88283044).

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

66012636 is a wasteful number, since it uses less digits than its factorization.

66012636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9513 (or 9511 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 66012636 is about 8124.8160594564. The cubic root of 66012636 is about 404.1497908755.

The spelling of 66012636 in words is "sixty-six million, twelve thousand, six hundred thirty-six".