166810540 has 24 divisors (see below), whose sum is σ = 377249040. Its totient is φ = 61591488.

The previous prime is 166810531. The next prime is 166810543. The reversal of 166810540 is 45018661.

It is not an unprimeable number, because it can be changed into a prime (166810543) 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, 320530 + ... + 321049.

It is an arithmetic number, because the mean of its divisors is an integer number (15718710).

Almost surely, 2^166810540 is an apocalyptic number.

166810540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166810540 is an abundant number, since it is smaller than the sum of its proper divisors (210438500).

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

166810540 is a wasteful number, since it uses less digits than its factorization.

166810540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641601 (or 641599 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 166810540 is about 12915.5154755821. The cubic root of 166810540 is about 550.4795156986.

The spelling of 166810540 in words is "one hundred sixty-six million, eight hundred ten thousand, five hundred forty".