663762125 has 16 divisors (see below), whose sum is σ = 892098480. Its totient is φ = 490161600.

The previous prime is 663762109. The next prime is 663762137. The reversal of 663762125 is 521267366.

It can be written as a sum of positive squares in 8 ways, for example, as 456805129 + 206956996 = 21373^2 + 14386^2 .

It is not a de Polignac number, because 663762125 - 2⁴ = 663762109 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 202610 + ... + 205859.

It is an arithmetic number, because the mean of its divisors is an integer number (55756155).

Almost surely, 2^663762125 is an apocalyptic number.

663762125 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

663762125 is a deficient number, since it is larger than the sum of its proper divisors (228336355).

663762125 is a wasteful number, since it uses less digits than its factorization.

663762125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408497 (or 408487 counting only the distinct ones).

The product of its digits is 90720, while the sum is 38.

The square root of 663762125 is about 25763.5813698329. The cubic root of 663762125 is about 872.3099423739.

The spelling of 663762125 in words is "six hundred sixty-three million, seven hundred sixty-two thousand, one hundred twenty-five".