66100016499131 has 2 divisors, whose sum is σ = 66100016499132. Its totient is φ = 66100016499130.

The previous prime is 66100016499119. The next prime is 66100016499151. The reversal of 66100016499131 is 13199461000166.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66100016499131 is a prime.

It is a super-2 number, since 2×66100016499131² (a number of 28 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 (66100016499151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33050008249565 + 33050008249566.

It is an arithmetic number, because the mean of its divisors is an integer number (33050008249566).

Almost surely, 2^{66100016499131} is an apocalyptic number.

66100016499131 is a deficient number, since it is larger than the sum of its proper divisors (1).

66100016499131 is an equidigital number, since it uses as much as digits as its factorization.

66100016499131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952, while the sum is 47.

Adding to 66100016499131 its reverse (13199461000166), we get a palindrome (79299477499297).

The spelling of 66100016499131 in words is "sixty-six trillion, one hundred billion, sixteen million, four hundred ninety-nine thousand, one hundred thirty-one".