66054998731 has 2 divisors, whose sum is σ = 66054998732. Its totient is φ = 66054998730.

The previous prime is 66054998707. The next prime is 66054998761. The reversal of 66054998731 is 13789945066.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66054998731 - 2⁵ = 66054998699 is a prime.

It is a super-2 number, since 2×66054998731² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66054998761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33027499365 + 33027499366.

It is an arithmetic number, because the mean of its divisors is an integer number (33027499366).

Almost surely, 2^66054998731 is an apocalyptic number.

66054998731 is a deficient number, since it is larger than the sum of its proper divisors (1).

66054998731 is an equidigital number, since it uses as much as digits as its factorization.

66054998731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9797760, while the sum is 58.

The spelling of 66054998731 in words is "sixty-six billion, fifty-four million, nine hundred ninety-eight thousand, seven hundred thirty-one".