90161966 has 8 divisors (see below), whose sum is σ = 136484040. Its totient is φ = 44667288.

The previous prime is 90161921. The next prime is 90161969. The reversal of 90161966 is 66916109.

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

It is a super-2 number, since 2×90161966² = 16258360225970312, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90161969) 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, 206576 + ... + 207011.

It is an arithmetic number, because the mean of its divisors is an integer number (17060505).

Almost surely, 2^90161966 is an apocalyptic number.

90161966 is a deficient number, since it is larger than the sum of its proper divisors (46322074).

90161966 is a wasteful number, since it uses less digits than its factorization.

90161966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413698.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 90161966 is about 9495.3655011274. The cubic root of 90161966 is about 448.4091414062.

The spelling of 90161966 in words is "ninety million, one hundred sixty-one thousand, nine hundred sixty-six".