663564011 has 4 divisors (see below), whose sum is σ = 723888024. Its totient is φ = 603240000.

The previous prime is 663563981. The next prime is 663564023. The reversal of 663564011 is 110465366.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 663564011 - 2²² = 659369707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663564061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30161990 + ... + 30162011.

It is an arithmetic number, because the mean of its divisors is an integer number (180972006).

Almost surely, 2^663564011 is an apocalyptic number.

663564011 is a deficient number, since it is larger than the sum of its proper divisors (60324013).

663564011 is a wasteful number, since it uses less digits than its factorization.

663564011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60324012.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 663564011 is about 25759.7362370037. The cubic root of 663564011 is about 872.2231472195.

The spelling of 663564011 in words is "six hundred sixty-three million, five hundred sixty-four thousand, eleven".