66488104931 has 4 divisors (see below), whose sum is σ = 66514294200. Its totient is φ = 66461915664.

The previous prime is 66488104927. The next prime is 66488104937. The reversal of 66488104931 is 13940188466.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66488104931 - 2² = 66488104927 is a prime.

It is a super-2 number, since 2×66488104931² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66488104931.

It is not an unprimeable number, because it can be changed into a prime (66488104937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13090826 + ... + 13095903.

It is an arithmetic number, because the mean of its divisors is an integer number (16628573550).

Almost surely, 2^66488104931 is an apocalyptic number.

66488104931 is a deficient number, since it is larger than the sum of its proper divisors (26189269).

66488104931 is a wasteful number, since it uses less digits than its factorization.

66488104931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26189268.

The product of its (nonzero) digits is 995328, while the sum is 50.

The spelling of 66488104931 in words is "sixty-six billion, four hundred eighty-eight million, one hundred four thousand, nine hundred thirty-one".