663612427 has 16 divisors (see below), whose sum is σ = 690161472. Its totient is φ = 637580160.

The previous prime is 663612407. The next prime is 663612451. The reversal of 663612427 is 724216366.

It is a cyclic number.

It is not a de Polignac number, because 663612427 - 2¹⁵ = 663579659 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663612407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1319058 + ... + 1319560.

It is an arithmetic number, because the mean of its divisors is an integer number (43135092).

Almost surely, 2^663612427 is an apocalyptic number.

663612427 is a deficient number, since it is larger than the sum of its proper divisors (26549045).

663612427 is a wasteful number, since it uses less digits than its factorization.

663612427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918.

The product of its digits is 72576, while the sum is 37.

The square root of 663612427 is about 25760.6759810375. The cubic root of 663612427 is about 872.2443602088.

The spelling of 663612427 in words is "six hundred sixty-three million, six hundred twelve thousand, four hundred twenty-seven".