66102931 has 2 divisors, whose sum is σ = 66102932. Its totient is φ = 66102930.

The previous prime is 66102923. The next prime is 66102961. The reversal of 66102931 is 13920166.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66102931 - 2³ = 66102923 is a prime.

It is a super-2 number, since 2×66102931² = 8739194973581522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66102931.

It is not a weakly prime, because it can be changed into another prime (66102961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33051465 + 33051466.

It is an arithmetic number, because the mean of its divisors is an integer number (33051466).

Almost surely, 2^66102931 is an apocalyptic number.

66102931 is a deficient number, since it is larger than the sum of its proper divisors (1).

66102931 is an equidigital number, since it uses as much as digits as its factorization.

66102931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 66102931 is about 8130.3709017486. The cubic root of 66102931 is about 404.3339782344. Note that the first 3 decimals are identical.

The spelling of 66102931 in words is "sixty-six million, one hundred two thousand, nine hundred thirty-one".