90730666 has 32 divisors (see below), whose sum is σ = 156029328. Its totient is φ = 39198720.

The previous prime is 90730639. The next prime is 90730669. The reversal of 90730666 is 66603709.

It can be written as a sum of positive squares in 8 ways, for example, as 13905441 + 76825225 = 3729^2 + 8765^2 .

It is not an unprimeable number, because it can be changed into a prime (90730669) 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, 102546 + ... + 103426.

Almost surely, 2^90730666 is an apocalyptic number.

90730666 is a deficient number, since it is larger than the sum of its proper divisors (65298662).

90730666 is a wasteful number, since it uses less digits than its factorization.

90730666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1146.

The product of its (nonzero) digits is 40824, while the sum is 37.

The square root of 90730666 is about 9525.2646157469. The cubic root of 90730666 is about 449.3499519595.

The spelling of 90730666 in words is "ninety million, seven hundred thirty thousand, six hundred sixty-six".