66015772 has 12 divisors (see below), whose sum is σ = 115768240. Its totient is φ = 32939136.

The previous prime is 66015751. The next prime is 66015787. The reversal of 66015772 is 27751066.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14997 + ... + 18892.

Almost surely, 2^66015772 is an apocalyptic number.

It is an amenable number.

66015772 is a deficient number, since it is larger than the sum of its proper divisors (49752468).

66015772 is a wasteful number, since it uses less digits than its factorization.

66015772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34380 (or 34378 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 66015772 is about 8125.0090461488. The cubic root of 66015772 is about 404.1561906284.

The spelling of 66015772 in words is "sixty-six million, fifteen thousand, seven hundred seventy-two".