66861832 has 32 divisors (see below), whose sum is σ = 129055680. Its totient is φ = 32460480.

The previous prime is 66861803. The next prime is 66861841. The reversal of 66861832 is 23816866.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42907 + ... + 44437.

It is an arithmetic number, because the mean of its divisors is an integer number (4032990).

Almost surely, 2^66861832 is an apocalyptic number.

It is an amenable number.

66861832 is a deficient number, since it is larger than the sum of its proper divisors (62193848).

66861832 is a wasteful number, since it uses less digits than its factorization.

66861832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1693 (or 1689 counting only the distinct ones).

The product of its digits is 82944, while the sum is 40.

The square root of 66861832 is about 8176.9084622490. The cubic root of 66861832 is about 405.8754258781.

It can be divided in two parts, 668 and 61832, that added together give a square (62500 = 250²).

The spelling of 66861832 in words is "sixty-six million, eight hundred sixty-one thousand, eight hundred thirty-two".