66674656 has 12 divisors (see below), whose sum is σ = 131265792. Its totient is φ = 33337312.

The previous prime is 66674627. The next prime is 66674687. The reversal of 66674656 is 65647666.

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 as a sum of consecutive naturals, namely, 1041760 + ... + 1041823.

It is an arithmetic number, because the mean of its divisors is an integer number (10938816).

Almost surely, 2^66674656 is an apocalyptic number.

It is an amenable number.

66674656 is a deficient number, since it is larger than the sum of its proper divisors (64591136).

66674656 is a wasteful number, since it uses less digits than its factorization.

66674656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2083593 (or 2083585 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 46.

The square root of 66674656 is about 8165.4550393717. The cubic root of 66674656 is about 405.4963299709.

The spelling of 66674656 in words is "sixty-six million, six hundred seventy-four thousand, six hundred fifty-six".