166099728 has 40 divisors (see below), whose sum is σ = 431272000. Its totient is φ = 55085184.

The previous prime is 166099727. The next prime is 166099777. The reversal of 166099728 is 827990661.

166099728 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 (48).

It is not an unprimeable number, because it can be changed into a prime (166099723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 858 + ... + 18246.

It is an arithmetic number, because the mean of its divisors is an integer number (10781800).

Almost surely, 2^166099728 is an apocalyptic number.

It is an amenable number.

166099728 is an abundant number, since it is smaller than the sum of its proper divisors (265172272).

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

166099728 is a wasteful number, since it uses less digits than its factorization.

166099728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17599 (or 17593 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 166099728 is about 12887.9683426054. The cubic root of 166099728 is about 549.6965025292.

The spelling of 166099728 in words is "one hundred sixty-six million, ninety-nine thousand, seven hundred twenty-eight".