647966025 has 144 divisors (see below), whose sum is σ = 1423718400. Its totient is φ = 275114880.

The previous prime is 647966003. The next prime is 647966029. The reversal of 647966025 is 520669746.

It is not a de Polignac number, because 647966025 - 2⁵ = 647965993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (647966029) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1765392 + ... + 1765758.

Almost surely, 2^647966025 is an apocalyptic number.

It is an amenable number.

647966025 is an abundant number, since it is smaller than the sum of its proper divisors (775752375).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

647966025 is a wasteful number, since it uses less digits than its factorization.

647966025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468 (or 460 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The square root of 647966025 is about 25455.1767819436. The cubic root of 647966025 is about 865.3346183309.

The spelling of 647966025 in words is "six hundred forty-seven million, nine hundred sixty-six thousand, twenty-five".