66486731 has 2 divisors, whose sum is σ = 66486732. Its totient is φ = 66486730.

The previous prime is 66486727. The next prime is 66486773. The reversal of 66486731 is 13768466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66486731 - 2² = 66486727 is a prime.

It is a super-2 number, since 2×66486731² = 8840970798132722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66386731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33243365 + 33243366.

It is an arithmetic number, because the mean of its divisors is an integer number (33243366).

Almost surely, 2^66486731 is an apocalyptic number.

66486731 is a deficient number, since it is larger than the sum of its proper divisors (1).

66486731 is an equidigital number, since it uses as much as digits as its factorization.

66486731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 41.

The square root of 66486731 is about 8153.9395999725. The cubic root of 66486731 is about 405.1150026507.

The spelling of 66486731 in words is "sixty-six million, four hundred eighty-six thousand, seven hundred thirty-one".