66591497104 has 40 divisors (see below), whose sum is σ = 144554283648. Its totient is φ = 29450782080.

The previous prime is 66591497101. The next prime is 66591497143. The reversal of 66591497104 is 40179419566.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (66591497101) 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, 5106472 + ... + 5119495.

Almost surely, 2^66591497104 is an apocalyptic number.

It is an amenable number.

66591497104 is an abundant number, since it is smaller than the sum of its proper divisors (77962786544).

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

66591497104 is a wasteful number, since it uses less digits than its factorization.

66591497104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10226023 (or 10226017 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 52.

The spelling of 66591497104 in words is "sixty-six billion, five hundred ninety-one million, four hundred ninety-seven thousand, one hundred four".