90662661 has 24 divisors (see below), whose sum is σ = 138453120. Its totient is φ = 57010176.

The previous prime is 90662647. The next prime is 90662681. The reversal of 90662661 is 16626609.

It is a happy number.

It is not a de Polignac number, because 90662661 - 2⁵ = 90662629 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90662681) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42916 + ... + 44978.

It is an arithmetic number, because the mean of its divisors is an integer number (5768880).

Almost surely, 2^90662661 is an apocalyptic number.

It is an amenable number.

90662661 is a deficient number, since it is larger than the sum of its proper divisors (47790459).

90662661 is a wasteful number, since it uses less digits than its factorization.

90662661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2345 (or 2342 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 90662661 is about 9521.6942294951. The cubic root of 90662661 is about 449.2376573969.

The spelling of 90662661 in words is "ninety million, six hundred sixty-two thousand, six hundred sixty-one".