90723666 has 16 divisors (see below), whose sum is σ = 197942688. Its totient is φ = 27492000.

The previous prime is 90723649. The next prime is 90723673. The reversal of 90723666 is 66632709.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 687235 + ... + 687366.

It is an arithmetic number, because the mean of its divisors is an integer number (12371418).

Almost surely, 2^90723666 is an apocalyptic number.

90723666 is an abundant number, since it is smaller than the sum of its proper divisors (107219022).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90723666 is a wasteful number, since it uses less digits than its factorization.

90723666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1374617.

The product of its (nonzero) digits is 81648, while the sum is 39.

The square root of 90723666 is about 9524.8971647992. The cubic root of 90723666 is about 449.3383956662.

The spelling of 90723666 in words is "ninety million, seven hundred twenty-three thousand, six hundred sixty-six".