66947412772 has 24 divisors (see below), whose sum is σ = 119163637376. Its totient is φ = 32902819488.

The previous prime is 66947412733. The next prime is 66947412793. The reversal of 66947412772 is 27721474966.

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 in 7 ways as a sum of consecutive naturals, for example, 145683 + ... + 393850.

Almost surely, 2^66947412772 is an apocalyptic number.

It is an amenable number.

66947412772 is a deficient number, since it is larger than the sum of its proper divisors (52216224604).

66947412772 is a wasteful number, since it uses less digits than its factorization.

66947412772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540067 (or 540065 counting only the distinct ones).

The product of its digits is 7112448, while the sum is 55.

The spelling of 66947412772 in words is "sixty-six billion, nine hundred forty-seven million, four hundred twelve thousand, seven hundred seventy-two".