164663280 has 100 divisors (see below), whose sum is σ = 571922472. Its totient is φ = 43908480.

The previous prime is 164663273. The next prime is 164663281. The reversal of 164663280 is 82366461.

164663280 is a `hidden beast` number, since 1 + 646 + 6 + 3 + 2 + 8 + 0 = 666.

164663280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×164663280² = 54227991560716800, 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 not an unprimeable number, because it can be changed into a prime (164663281) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6226 + ... + 19185.

Almost surely, 2^164663280 is an apocalyptic number.

164663280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164663280 is an abundant number, since it is smaller than the sum of its proper divisors (407259192).

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

164663280 is a wasteful number, since it uses less digits than its factorization.

164663280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25436 (or 25421 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 164663280 is about 12832.1190767542. The cubic root of 164663280 is about 548.1073013462.

The spelling of 164663280 in words is "one hundred sixty-four million, six hundred sixty-three thousand, two hundred eighty".