163666400 has 36 divisors (see below), whose sum is σ = 399552552. Its totient is φ = 65466240.

The previous prime is 163666379. The next prime is 163666411. The reversal of 163666400 is 4666361.

163666400 is digitally balanced in base 3, 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 (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 101492 + ... + 103091.

It is an arithmetic number, because the mean of its divisors is an integer number (11098682).

Almost surely, 2^163666400 is an apocalyptic number.

163666400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163666400 is an abundant number, since it is smaller than the sum of its proper divisors (235886152).

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

163666400 is a wasteful number, since it uses less digits than its factorization.

163666400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204603 (or 204590 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 163666400 is about 12793.2169527449. The cubic root of 163666400 is about 546.9989717313.

The spelling of 163666400 in words is "one hundred sixty-three million, six hundred sixty-six thousand, four hundred".