66641576604 has 24 divisors (see below), whose sum is σ = 159699635088. Its totient is φ = 21613484160.

The previous prime is 66641576531. The next prime is 66641576621. The reversal of 66641576604 is 40667514666.

It is a congruent 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, 75046377 + ... + 75047264.

It is an arithmetic number, because the mean of its divisors is an integer number (6654151462).

Almost surely, 2^66641576604 is an apocalyptic number.

It is an amenable number.

66641576604 is an abundant number, since it is smaller than the sum of its proper divisors (93058058484).

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

66641576604 is a wasteful number, since it uses less digits than its factorization.

66641576604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150093685 (or 150093683 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 51.

The spelling of 66641576604 in words is "sixty-six billion, six hundred forty-one million, five hundred seventy-six thousand, six hundred four".