66729952 has 12 divisors (see below), whose sum is σ = 131374656. Its totient is φ = 33364960.

The previous prime is 66729941. The next prime is 66729953. The reversal of 66729952 is 25992766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66729953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1042624 + ... + 1042687.

It is an arithmetic number, because the mean of its divisors is an integer number (10947888).

Almost surely, 2^66729952 is an apocalyptic number.

It is an amenable number.

66729952 is a deficient number, since it is larger than the sum of its proper divisors (64644704).

66729952 is a wasteful number, since it uses less digits than its factorization.

66729952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2085321 (or 2085313 counting only the distinct ones).

The product of its digits is 408240, while the sum is 46.

The square root of 66729952 is about 8168.8403093707. The cubic root of 66729952 is about 405.6083971875.

The spelling of 66729952 in words is "sixty-six million, seven hundred twenty-nine thousand, nine hundred fifty-two".