90029666 has 4 divisors (see below), whose sum is σ = 135044502. Its totient is φ = 45014832.

The previous prime is 90029663. The next prime is 90029689. The reversal of 90029666 is 66692009.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66692009 = 1499 ⋅44491.

It can be written as a sum of positive squares in only one way, i.e., 81450625 + 8579041 = 9025^2 + 2929^2 .

It is not an unprimeable number, because it can be changed into a prime (90029663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22507415 + ... + 22507418.

Almost surely, 2^90029666 is an apocalyptic number.

90029666 is a deficient number, since it is larger than the sum of its proper divisors (45014836).

90029666 is a wasteful number, since it uses less digits than its factorization.

90029666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45014835.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 90029666 is about 9488.3963871668. The cubic root of 90029666 is about 448.1897082663.

The spelling of 90029666 in words is "ninety million, twenty-nine thousand, six hundred sixty-six".