66612546131 has 2 divisors, whose sum is σ = 66612546132. Its totient is φ = 66612546130.

The previous prime is 66612546113. The next prime is 66612546137. The reversal of 66612546131 is 13164521666.

66612546131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (66612546113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66612546131 - 2⁶ = 66612546067 is a prime.

It is a super-2 number, since 2×66612546131² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (66612546137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33306273065 + 33306273066.

It is an arithmetic number, because the mean of its divisors is an integer number (33306273066).

Almost surely, 2^66612546131 is an apocalyptic number.

66612546131 is a deficient number, since it is larger than the sum of its proper divisors (1).

66612546131 is an equidigital number, since it uses as much as digits as its factorization.

66612546131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 41.

The spelling of 66612546131 in words is "sixty-six billion, six hundred twelve million, five hundred forty-six thousand, one hundred thirty-one".