66156532 has 24 divisors (see below), whose sum is σ = 127583456. Its totient is φ = 29822688.

The previous prime is 66156529. The next prime is 66156539. The reversal of 66156532 is 23565166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66156539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12558 + ... + 17029.

Almost surely, 2^66156532 is an apocalyptic number.

It is an amenable number.

66156532 is a deficient number, since it is larger than the sum of its proper divisors (61426924).

66156532 is a wasteful number, since it uses less digits than its factorization.

66156532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29647 (or 29645 counting only the distinct ones).

The product of its digits is 32400, while the sum is 34.

The square root of 66156532 is about 8133.6665778725. Note that the first 3 decimals coincide. The cubic root of 66156532 is about 404.4432363764.

The spelling of 66156532 in words is "sixty-six million, one hundred fifty-six thousand, five hundred thirty-two".