66471022372 has 6 divisors (see below), whose sum is σ = 116324289158. Its totient is φ = 33235511184.

The previous prime is 66471022369. The next prime is 66471022381. The reversal of 66471022372 is 27322017466.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 33465580096 + 33005442276 = 182936^2 + 181674^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8308877793 + ... + 8308877800.

Almost surely, 2^66471022372 is an apocalyptic number.

It is an amenable number.

66471022372 is a deficient number, since it is larger than the sum of its proper divisors (49853266786).

66471022372 is a wasteful number, since it uses less digits than its factorization.

66471022372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16617755597 (or 16617755595 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 40.

The spelling of 66471022372 in words is "sixty-six billion, four hundred seventy-one million, twenty-two thousand, three hundred seventy-two".