662742917 has 2 divisors, whose sum is σ = 662742918. Its totient is φ = 662742916.

The previous prime is 662742889. The next prime is 662742923. The reversal of 662742917 is 719247266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 533101921 + 129640996 = 23089^2 + 11386^2 .

It is a cyclic number.

It is not a de Polignac number, because 662742917 - 2¹⁸ = 662480773 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (662742317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331371458 + 331371459.

It is an arithmetic number, because the mean of its divisors is an integer number (331371459).

Almost surely, 2^662742917 is an apocalyptic number.

It is an amenable number.

662742917 is a deficient number, since it is larger than the sum of its proper divisors (1).

662742917 is an equidigital number, since it uses as much as digits as its factorization.

662742917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 44.

The square root of 662742917 is about 25743.7937569427. The cubic root of 662742917 is about 871.8632358000.

The spelling of 662742917 in words is "six hundred sixty-two million, seven hundred forty-two thousand, nine hundred seventeen".