66326549604 has 48 divisors (see below), whose sum is σ = 177032865408. Its totient is φ = 18933078528.

The previous prime is 66326549603. The next prime is 66326549617. The reversal of 66326549604 is 40694562366.

It is a super-2 number, since 2×66326549604² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66326549603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 269397 + ... + 453020.

It is an arithmetic number, because the mean of its divisors is an integer number (3688184696).

Almost surely, 2^66326549604 is an apocalyptic number.

It is an amenable number.

66326549604 is an abundant number, since it is smaller than the sum of its proper divisors (110706315804).

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

66326549604 is a wasteful number, since it uses less digits than its factorization.

66326549604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723524 (or 723522 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 51.

The spelling of 66326549604 in words is "sixty-six billion, three hundred twenty-six million, five hundred forty-nine thousand, six hundred four".