66195752131 has 2 divisors, whose sum is σ = 66195752132. Its totient is φ = 66195752130.

The previous prime is 66195752059. The next prime is 66195752143. The reversal of 66195752131 is 13125759166.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66195752131 - 2¹¹ = 66195750083 is a prime.

It is a super-2 number, since 2×66195752131² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66195752731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33097876065 + 33097876066.

It is an arithmetic number, because the mean of its divisors is an integer number (33097876066).

Almost surely, 2^66195752131 is an apocalyptic number.

66195752131 is a deficient number, since it is larger than the sum of its proper divisors (1).

66195752131 is an equidigital number, since it uses as much as digits as its factorization.

66195752131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 340200, while the sum is 46.

The spelling of 66195752131 in words is "sixty-six billion, one hundred ninety-five million, seven hundred fifty-two thousand, one hundred thirty-one".