663892020 has 72 divisors (see below), whose sum is σ = 2196885600. Its totient is φ = 160943040.

The previous prime is 663891989. The next prime is 663892037. The reversal of 663892020 is 20298366.

It is a super-2 number, since 2×663892020² = 881505228439360800, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 165670 + ... + 169629.

It is an arithmetic number, because the mean of its divisors is an integer number (30512300).

Almost surely, 2^663892020 is an apocalyptic number.

663892020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

663892020 is an abundant number, since it is smaller than the sum of its proper divisors (1532993580).

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

663892020 is a wasteful number, since it uses less digits than its factorization.

663892020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335325 (or 335320 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 663892020 is about 25766.1021499178. The cubic root of 663892020 is about 872.3668409249.

The spelling of 663892020 in words is "six hundred sixty-three million, eight hundred ninety-two thousand, twenty".