663507751025 has 12 divisors (see below), whose sum is σ = 940285270272. Its totient is φ = 454976743440.

The previous prime is 663507750991. The next prime is 663507751051. The reversal of 663507751025 is 520157705366.

It is a de Polignac number, because none of the positive numbers 2^k-663507751025 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1895736257 + ... + 1895736606.

It is an arithmetic number, because the mean of its divisors is an integer number (78357105856).

Almost surely, 2^663507751025 is an apocalyptic number.

It is an amenable number.

663507751025 is a deficient number, since it is larger than the sum of its proper divisors (276777519247).

663507751025 is a wasteful number, since it uses less digits than its factorization.

663507751025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3791472880 (or 3791472875 counting only the distinct ones).

The product of its (nonzero) digits is 1323000, while the sum is 47.

The spelling of 663507751025 in words is "six hundred sixty-three billion, five hundred seven million, seven hundred fifty-one thousand, twenty-five".