66749486404 has 12 divisors (see below), whose sum is σ = 117968152428. Its totient is φ = 33044300000.

The previous prime is 66749486371. The next prime is 66749486413. The reversal of 66749486404 is 40468494766.

It can be written as a sum of positive squares in 2 ways, for example, as 52408944900 + 14340541504 = 228930^2 + 119752^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82610347 + ... + 82611154.

It is an arithmetic number, because the mean of its divisors is an integer number (9830679369).

Almost surely, 2^66749486404 is an apocalyptic number.

It is an amenable number.

66749486404 is a deficient number, since it is larger than the sum of its proper divisors (51218666024).

66749486404 is a wasteful number, since it uses less digits than its factorization.

66749486404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165221606 (or 165221604 counting only the distinct ones).

The product of its (nonzero) digits is 27869184, while the sum is 58.

The spelling of 66749486404 in words is "sixty-six billion, seven hundred forty-nine million, four hundred eighty-six thousand, four hundred four".