660624463 has 4 divisors (see below), whose sum is σ = 662879448. Its totient is φ = 658369480.

The previous prime is 660624451. The next prime is 660624487. The reversal of 660624463 is 364426066.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 660624463 - 2²⁹ = 123753551 is a prime.

It is a super-2 number, since 2×660624463² = 872849362228076738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660624413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1127053 + ... + 1127638.

It is an arithmetic number, because the mean of its divisors is an integer number (165719862).

Almost surely, 2^660624463 is an apocalyptic number.

660624463 is a deficient number, since it is larger than the sum of its proper divisors (2254985).

660624463 is a wasteful number, since it uses less digits than its factorization.

660624463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2254984.

The product of its (nonzero) digits is 124416, while the sum is 37.

The square root of 660624463 is about 25702.6158785443. The cubic root of 660624463 is about 870.9332755839.

The spelling of 660624463 in words is "six hundred sixty million, six hundred twenty-four thousand, four hundred sixty-three".