263216664 has 48 divisors (see below), whose sum is σ = 713770200. Its totient is φ = 87629184.

The previous prime is 263216659. The next prime is 263216687. The reversal of 263216664 is 466612362.

263216664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent 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, 72607 + ... + 76145.

Almost surely, 2^263216664 is an apocalyptic number.

263216664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

263216664 is an abundant number, since it is smaller than the sum of its proper divisors (450553536).

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

263216664 is a wasteful number, since it uses less digits than its factorization.

263216664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4584 (or 4577 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 263216664 is about 16223.9534022999. The cubic root of 263216664 is about 640.8717482447.

The spelling of 263216664 in words is "two hundred sixty-three million, two hundred sixteen thousand, six hundred sixty-four".