66488561494692 has 48 divisors (see below), whose sum is σ = 155557153382400. Its totient is φ = 22103295029280.

The previous prime is 66488561494673. The next prime is 66488561494697. The reversal of 66488561494692 is 29649416588466.

66488561494692 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×66488561494692² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66488561494697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11698659 + ... + 16426677.

It is an arithmetic number, because the mean of its divisors is an integer number (3240774028800).

Almost surely, 2^{66488561494692} is an apocalyptic number.

It is an amenable number.

66488561494692 is an abundant number, since it is smaller than the sum of its proper divisors (89068591887708).

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

66488561494692 is a wasteful number, since it uses less digits than its factorization.

66488561494692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4731176 (or 4731174 counting only the distinct ones).

The product of its digits is 4299816960, while the sum is 78.

The spelling of 66488561494692 in words is "sixty-six trillion, four hundred eighty-eight billion, five hundred sixty-one million, four hundred ninety-four thousand, six hundred ninety-two".