66672739408 has 40 divisors (see below), whose sum is σ = 143232145056. Its totient is φ = 29808969600.

The previous prime is 66672739369. The next prime is 66672739409. The reversal of 66672739408 is 80493727666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66672739409) 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, 3094366 + ... + 3115837.

Almost surely, 2^66672739408 is an apocalyptic number.

It is an amenable number.

66672739408 is an abundant number, since it is smaller than the sum of its proper divisors (76559405648).

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

66672739408 is a wasteful number, since it uses less digits than its factorization.

66672739408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6210283 (or 6210277 counting only the distinct ones).

The product of its (nonzero) digits is 18289152, while the sum is 58.

The spelling of 66672739408 in words is "sixty-six billion, six hundred seventy-two million, seven hundred thirty-nine thousand, four hundred eight".