166544490 has 32 divisors (see below), whose sum is σ = 456808320. Its totient is φ = 38067264.

The previous prime is 166544473. The next prime is 166544507. The reversal of 166544490 is 94445661.

166544490 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (166544473) and next prime (166544507).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 396325 + ... + 396744.

It is an arithmetic number, because the mean of its divisors is an integer number (14275260).

Almost surely, 2^166544490 is an apocalyptic number.

166544490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166544490 is an abundant number, since it is smaller than the sum of its proper divisors (290263830).

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

166544490 is a wasteful number, since it uses less digits than its factorization.

166544490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793086.

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 166544490 is about 12905.2117378988. The cubic root of 166544490 is about 550.1867024552.

The spelling of 166544490 in words is "one hundred sixty-six million, five hundred forty-four thousand, four hundred ninety".