90566661 has 16 divisors (see below), whose sum is σ = 122204160. Its totient is φ = 59658480.

The previous prime is 90566611. The next prime is 90566687. The reversal of 90566661 is 16666509.

It is not a de Polignac number, because 90566661 - 2⁷ = 90566533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90566611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102126 + ... + 103008.

It is an arithmetic number, because the mean of its divisors is an integer number (7637760).

Almost surely, 2^90566661 is an apocalyptic number.

It is an amenable number.

90566661 is a deficient number, since it is larger than the sum of its proper divisors (31637499).

90566661 is a wasteful number, since it uses less digits than its factorization.

90566661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256.

The product of its (nonzero) digits is 58320, while the sum is 39.

The square root of 90566661 is about 9516.6517746527. The cubic root of 90566661 is about 449.0790399260.

The spelling of 90566661 in words is "ninety million, five hundred sixty-six thousand, six hundred sixty-one".