66772672 has 14 divisors (see below), whose sum is σ = 132502148. Its totient is φ = 33386304.

The previous prime is 66772639. The next prime is 66772697. The reversal of 66772672 is 27627766.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521598 + ... + 521725.

Almost surely, 2^66772672 is an apocalyptic number.

It is an amenable number.

66772672 is a deficient number, since it is larger than the sum of its proper divisors (65729476).

66772672 is a wasteful number, since it uses less digits than its factorization.

66772672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043335 (or 1043325 counting only the distinct ones).

The product of its digits is 296352, while the sum is 43.

The square root of 66772672 is about 8171.4547052529. The cubic root of 66772672 is about 405.6949345112.

The spelling of 66772672 in words is "sixty-six million, seven hundred seventy-two thousand, six hundred seventy-two".