66604014251 has 2 divisors, whose sum is σ = 66604014252. Its totient is φ = 66604014250.

The previous prime is 66604014229. The next prime is 66604014277. The reversal of 66604014251 is 15241040666.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66604014251 is a prime.

It is a super-2 number, since 2×66604014251² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66604010251) 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 as a sum of consecutive naturals, namely, 33302007125 + 33302007126.

It is an arithmetic number, because the mean of its divisors is an integer number (33302007126).

Almost surely, 2^66604014251 is an apocalyptic number.

66604014251 is a deficient number, since it is larger than the sum of its proper divisors (1).

66604014251 is an equidigital number, since it uses as much as digits as its factorization.

66604014251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 35.

The spelling of 66604014251 in words is "sixty-six billion, six hundred four million, fourteen thousand, two hundred fifty-one".