667365137 has 2 divisors, whose sum is σ = 667365138. Its totient is φ = 667365136.

The previous prime is 667365109. The next prime is 667365143. The reversal of 667365137 is 731563766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 576048001 + 91317136 = 24001^2 + 9556^2 .

It is a cyclic number.

It is not a de Polignac number, because 667365137 - 2¹² = 667361041 is a prime.

It is not a weakly prime, because it can be changed into another prime (667365037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333682568 + 333682569.

It is an arithmetic number, because the mean of its divisors is an integer number (333682569).

Almost surely, 2^667365137 is an apocalyptic number.

It is an amenable number.

667365137 is a deficient number, since it is larger than the sum of its proper divisors (1).

667365137 is an equidigital number, since it uses as much as digits as its factorization.

667365137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 476280, while the sum is 44.

The square root of 667365137 is about 25833.4112536459. The cubic root of 667365137 is about 873.8854432711.

The spelling of 667365137 in words is "six hundred sixty-seven million, three hundred sixty-five thousand, one hundred thirty-seven".