66888832 has 16 divisors (see below), whose sum is σ = 133255350. Its totient is φ = 33444352.

The previous prime is 66888823. The next prime is 66888841. The reversal of 66888832 is 23888866.

It is an interprime number because it is at equal distance from previous prime (66888823) and next prime (66888841).

It can be written as a sum of positive squares in only one way, i.e., 44836416 + 22052416 = 6696^2 + 4696^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261157 + ... + 261412.

Almost surely, 2^66888832 is an apocalyptic number.

It is an amenable number.

66888832 is a deficient number, since it is larger than the sum of its proper divisors (66366518).

66888832 is an equidigital number, since it uses as much as digits as its factorization.

66888832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522583 (or 522571 counting only the distinct ones).

The product of its digits is 884736, while the sum is 49.

The square root of 66888832 is about 8178.5592863291. The cubic root of 66888832 is about 405.9300517706.

The spelling of 66888832 in words is "sixty-six million, eight hundred eighty-eight thousand, eight hundred thirty-two".