667035697 has 2 divisors, whose sum is σ = 667035698. Its totient is φ = 667035696.

The previous prime is 667035661. The next prime is 667035709. The reversal of 667035697 is 796530766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 533425216 + 133610481 = 23096^2 + 11559^2 .

It is a cyclic number.

It is not a de Polignac number, because 667035697 - 2⁷ = 667035569 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 667035697.

It is not a weakly prime, because it can be changed into another prime (667035617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333517848 + 333517849.

It is an arithmetic number, because the mean of its divisors is an integer number (333517849).

Almost surely, 2^667035697 is an apocalyptic number.

It is an amenable number.

667035697 is a deficient number, since it is larger than the sum of its proper divisors (1).

667035697 is an equidigital number, since it uses as much as digits as its factorization.

667035697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1428840, while the sum is 49.

The square root of 667035697 is about 25827.0342277235. The cubic root of 667035697 is about 873.7416238487.

The spelling of 667035697 in words is "six hundred sixty-seven million, thirty-five thousand, six hundred ninety-seven".