66790922131 has 4 divisors (see below), whose sum is σ = 66904706232. Its totient is φ = 66677138032.

The previous prime is 66790922087. The next prime is 66790922189. The reversal of 66790922131 is 13122909766.

It is a happy number.

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 66790922131 - 2¹¹ = 66790920083 is a prime.

It is a super-2 number, since 2×66790922131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66790922831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56891170 + ... + 56892343.

It is an arithmetic number, because the mean of its divisors is an integer number (16726176558).

Almost surely, 2^66790922131 is an apocalyptic number.

66790922131 is a deficient number, since it is larger than the sum of its proper divisors (113784101).

66790922131 is a wasteful number, since it uses less digits than its factorization.

66790922131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113784100.

The product of its (nonzero) digits is 244944, while the sum is 46.

The spelling of 66790922131 in words is "sixty-six billion, seven hundred ninety million, nine hundred twenty-two thousand, one hundred thirty-one".