166802890 has 8 divisors (see below), whose sum is σ = 300245220. Its totient is φ = 66721152.

The previous prime is 166802887. The next prime is 166802893. The reversal of 166802890 is 98208661.

It is an interprime number because it is at equal distance from previous prime (166802887) and next prime (166802893).

It can be written as a sum of positive squares in 2 ways, for example, as 164070481 + 2732409 = 12809^2 + 1653^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×166802890² = 55646408224704200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166802893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8340135 + ... + 8340154.

Almost surely, 2^166802890 is an apocalyptic number.

166802890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166802890 is a deficient number, since it is larger than the sum of its proper divisors (133442330).

166802890 is a wasteful number, since it uses less digits than its factorization.

166802890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16680296.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 166802890 is about 12915.2193167596. The cubic root of 166802890 is about 550.4711004976.

The spelling of 166802890 in words is "one hundred sixty-six million, eight hundred two thousand, eight hundred ninety".