667553017 has 2 divisors, whose sum is σ = 667553018. Its totient is φ = 667553016.

The previous prime is 667553009. The next prime is 667553023. The reversal of 667553017 is 710355766.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 666878976 + 674041 = 25824^2 + 821^2 .

It is a cyclic number.

It is not a de Polignac number, because 667553017 - 2³ = 667553009 is a prime.

It is not a weakly prime, because it can be changed into another prime (667557017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333776508 + 333776509.

It is an arithmetic number, because the mean of its divisors is an integer number (333776509).

Almost surely, 2^667553017 is an apocalyptic number.

It is an amenable number.

667553017 is a deficient number, since it is larger than the sum of its proper divisors (1).

667553017 is an equidigital number, since it uses as much as digits as its factorization.

667553017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 132300, while the sum is 40.

The square root of 667553017 is about 25837.0473738777. The cubic root of 667553017 is about 873.9674424561.

The spelling of 667553017 in words is "six hundred sixty-seven million, five hundred fifty-three thousand, seventeen".