166020740 has 12 divisors (see below), whose sum is σ = 348643596. Its totient is φ = 66408288.

The previous prime is 166020731. The next prime is 166020773. The reversal of 166020740 is 47020661.

It can be written as a sum of positive squares in 2 ways, for example, as 83137924 + 82882816 = 9118^2 + 9104^2 .

It is a super-2 number, since 2×166020740² = 55125772220295200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4150499 + ... + 4150538.

It is an arithmetic number, because the mean of its divisors is an integer number (29053633).

Almost surely, 2^166020740 is an apocalyptic number.

166020740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166020740 is an abundant number, since it is smaller than the sum of its proper divisors (182622856).

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

166020740 is a wasteful number, since it uses less digits than its factorization.

166020740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8301046 (or 8301044 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 166020740 is about 12884.9035696818. The cubic root of 166020740 is about 549.6093534566.

The spelling of 166020740 in words is "one hundred sixty-six million, twenty thousand, seven hundred forty".