66667674340 has 24 divisors (see below), whose sum is σ = 144518314752. Its totient is φ = 25806841440.

The previous prime is 66667674313. The next prime is 66667674383. The reversal of 66667674340 is 4347676666.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53763634 + ... + 53764873.

It is an arithmetic number, because the mean of its divisors is an integer number (6021596448).

Almost surely, 2^66667674340 is an apocalyptic number.

It is an amenable number.

66667674340 is an abundant number, since it is smaller than the sum of its proper divisors (77850640412).

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

66667674340 is a wasteful number, since it uses less digits than its factorization.

66667674340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107528547 (or 107528545 counting only the distinct ones).

The product of its (nonzero) digits is 18289152, while the sum is 55.

The spelling of 66667674340 in words is "sixty-six billion, six hundred sixty-seven million, six hundred seventy-four thousand, three hundred forty".