166801116 has 24 divisors (see below), whose sum is σ = 393894144. Its totient is φ = 54930160.

The previous prime is 166801097. The next prime is 166801139. The reversal of 166801116 is 611108661.

It is a happy number.

It is a super-2 number, since 2×166801116² = 55645224597690912, which contains 22 as substring.

It is a congruent number.

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, 82740 + ... + 84731.

It is an arithmetic number, because the mean of its divisors is an integer number (16412256).

Almost surely, 2^166801116 is an apocalyptic number.

It is an amenable number.

166801116 is an abundant number, since it is smaller than the sum of its proper divisors (227093028).

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

166801116 is a wasteful number, since it uses less digits than its factorization.

166801116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167561 (or 167559 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 166801116 is about 12915.1506379136. The cubic root of 166801116 is about 550.4691490142.

Adding to 166801116 its reverse (611108661), we get a palindrome (777909777).

The spelling of 166801116 in words is "one hundred sixty-six million, eight hundred one thousand, one hundred sixteen".