66847662372 has 24 divisors (see below), whose sum is σ = 156479424192. Its totient is φ = 22210904800.

The previous prime is 66847662367. The next prime is 66847662379. The reversal of 66847662372 is 27326674866.

It is not an unprimeable number, because it can be changed into a prime (66847662379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8952279 + ... + 8959742.

It is an arithmetic number, because the mean of its divisors is an integer number (6519976008).

Almost surely, 2^66847662372 is an apocalyptic number.

It is an amenable number.

66847662372 is an abundant number, since it is smaller than the sum of its proper divisors (89631761820).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66847662372 is a wasteful number, since it uses less digits than its factorization.

66847662372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17912339 (or 17912337 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 57.

The spelling of 66847662372 in words is "sixty-six billion, eight hundred forty-seven million, six hundred sixty-two thousand, three hundred seventy-two".