66674006668 has 6 divisors (see below), whose sum is σ = 116679511676. Its totient is φ = 33337003332.

The previous prime is 66674006611. The next prime is 66674006669. The reversal of 66674006668 is 86660047666.

It is not an unprimeable number, because it can be changed into a prime (66674006669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8334250830 + ... + 8334250837.

Almost surely, 2^66674006668 is an apocalyptic number.

It is an amenable number.

66674006668 is a deficient number, since it is larger than the sum of its proper divisors (50005505008).

66674006668 is a wasteful number, since it uses less digits than its factorization.

66674006668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16668501671 (or 16668501669 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 55.

The spelling of 66674006668 in words is "sixty-six billion, six hundred seventy-four million, six thousand, six hundred sixty-eight".