665046973 has 2 divisors, whose sum is σ = 665046974. Its totient is φ = 665046972.

The previous prime is 665046947. The next prime is 665047013. The reversal of 665046973 is 379640566.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 529138009 + 135908964 = 23003^2 + 11658^2 .

It is a cyclic number.

It is not a de Polignac number, because 665046973 - 2²¹ = 662949821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665046073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332523486 + 332523487.

It is an arithmetic number, because the mean of its divisors is an integer number (332523487).

Almost surely, 2^665046973 is an apocalyptic number.

It is an amenable number.

665046973 is a deficient number, since it is larger than the sum of its proper divisors (1).

665046973 is an equidigital number, since it uses as much as digits as its factorization.

665046973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 816480, while the sum is 46.

The square root of 665046973 is about 25788.5046677779. The cubic root of 665046973 is about 872.8724246493.

The spelling of 665046973 in words is "six hundred sixty-five million, forty-six thousand, nine hundred seventy-three".