166528890 has 48 divisors (see below), whose sum is σ = 472339296. Its totient is φ = 40370400.

The previous prime is 166528871. The next prime is 166528907. The reversal of 166528890 is 98825661.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 83116 + ... + 85095.

It is an arithmetic number, because the mean of its divisors is an integer number (9840402).

Almost surely, 2^166528890 is an apocalyptic number.

166528890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166528890 is an abundant number, since it is smaller than the sum of its proper divisors (305810406).

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

166528890 is a wasteful number, since it uses less digits than its factorization.

166528890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168235 (or 168232 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 166528890 is about 12904.6073167687. The cubic root of 166528890 is about 550.1695235009.

The spelling of 166528890 in words is "one hundred sixty-six million, five hundred twenty-eight thousand, eight hundred ninety".