1000663265 has 16 divisors (see below), whose sum is σ = 1453064832. Its totient is φ = 645805824.

The previous prime is 1000663219. The next prime is 1000663271. The reversal of 1000663265 is 5623660001.

It is a cyclic number.

It is not a de Polignac number, because 1000663265 - 2¹⁰ = 1000662241 is a prime.

It is a Duffinian 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, 840299 + ... + 841488.

It is an arithmetic number, because the mean of its divisors is an integer number (90816552).

Almost surely, 2^1000663265 is an apocalyptic number.

It is an amenable number.

1000663265 is a deficient number, since it is larger than the sum of its proper divisors (452401567).

1000663265 is a wasteful number, since it uses less digits than its factorization.

1000663265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1681816.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 1000663265 is about 31633.2620037833. The cubic root of 1000663265 is about 1000.2210394713.

The spelling of 1000663265 in words is "one billion, six hundred sixty-three thousand, two hundred sixty-five".