665623463 has 2 divisors, whose sum is σ = 665623464. Its totient is φ = 665623462.

The previous prime is 665623393. The next prime is 665623477. The reversal of 665623463 is 364326566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 665623463 - 2⁸ = 665623207 is a prime.

It is a super-2 number, since 2×665623463² = 886109188992224738, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 665623463.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665623163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332811731 + 332811732.

It is an arithmetic number, because the mean of its divisors is an integer number (332811732).

Almost surely, 2^665623463 is an apocalyptic number.

665623463 is a deficient number, since it is larger than the sum of its proper divisors (1).

665623463 is an equidigital number, since it uses as much as digits as its factorization.

665623463 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 41.

The square root of 665623463 is about 25799.6795135133. The cubic root of 665623463 is about 873.1245656838.

The spelling of 665623463 in words is "six hundred sixty-five million, six hundred twenty-three thousand, four hundred sixty-three".