166246820 has 24 divisors (see below), whose sum is σ = 350246904. Its totient is φ = 66283776.

The previous prime is 166246819. The next prime is 166246853. The reversal of 166246820 is 28642661.

166246820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 506944 + 165739876 = 712^2 + 12874^2 .

It is a super-2 number, since 2×166246820² = 55276010320224800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7019 + ... + 19538.

It is an arithmetic number, because the mean of its divisors is an integer number (14593621).

Almost surely, 2^166246820 is an apocalyptic number.

166246820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166246820 is an abundant number, since it is smaller than the sum of its proper divisors (184000084).

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

166246820 is a wasteful number, since it uses less digits than its factorization.

166246820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26879 (or 26877 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 166246820 is about 12893.6736425272. The cubic root of 166246820 is about 549.8587185323.

The spelling of 166246820 in words is "one hundred sixty-six million, two hundred forty-six thousand, eight hundred twenty".