665708602487 has 2 divisors, whose sum is σ = 665708602488. Its totient is φ = 665708602486.

The previous prime is 665708602337. The next prime is 665708602513. The reversal of 665708602487 is 784206807566.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 665708602487 - 2¹⁰ = 665708601463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665708602687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332854301243 + 332854301244.

It is an arithmetic number, because the mean of its divisors is an integer number (332854301244).

Almost surely, 2^665708602487 is an apocalyptic number.

665708602487 is a deficient number, since it is larger than the sum of its proper divisors (1).

665708602487 is an equidigital number, since it uses as much as digits as its factorization.

665708602487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27095040, while the sum is 59.

The spelling of 665708602487 in words is "six hundred sixty-five billion, seven hundred eight million, six hundred two thousand, four hundred eighty-seven".