665675723 has 2 divisors, whose sum is σ = 665675724. Its totient is φ = 665675722.

The previous prime is 665675677. The next prime is 665675771. The reversal of 665675723 is 327576566.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-665675723 is a prime.

It is not a weakly prime, because it can be changed into another prime (665675123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332837861 + 332837862.

It is an arithmetic number, because the mean of its divisors is an integer number (332837862).

Almost surely, 2^665675723 is an apocalyptic number.

665675723 is a deficient number, since it is larger than the sum of its proper divisors (1).

665675723 is an equidigital number, since it uses as much as digits as its factorization.

665675723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1587600, while the sum is 47.

The square root of 665675723 is about 25800.6922969133. The cubic root of 665675723 is about 873.1474155873.

The spelling of 665675723 in words is "six hundred sixty-five million, six hundred seventy-five thousand, seven hundred twenty-three".