665614463 has 4 divisors (see below), whose sum is σ = 666436008. Its totient is φ = 664792920.

The previous prime is 665614451. The next prime is 665614471. The reversal of 665614463 is 364416566.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 364416566 = 2 ⋅182208283.

It is not a de Polignac number, because 665614463 - 2⁸ = 665614207 is a prime.

It is a super-2 number, since 2×665614463² = 886085226709556738, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 665614463.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665616463) 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 in 3 ways as a sum of consecutive naturals, for example, 409556 + ... + 411177.

It is an arithmetic number, because the mean of its divisors is an integer number (166609002).

Almost surely, 2^665614463 is an apocalyptic number.

665614463 is a deficient number, since it is larger than the sum of its proper divisors (821545).

665614463 is an equidigital number, since it uses as much as digits as its factorization.

665614463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821544.

The product of its digits is 311040, while the sum is 41.

The square root of 665614463 is about 25799.5050921524. The cubic root of 665614463 is about 873.1206304477.

The spelling of 665614463 in words is "six hundred sixty-five million, six hundred fourteen thousand, four hundred sixty-three".