90664405 has 16 divisors (see below), whose sum is σ = 117621504. Its totient is φ = 66692160.

The previous prime is 90664403. The next prime is 90664433. The reversal of 90664405 is 50446609.

It is not a de Polignac number, because 90664405 - 2¹ = 90664403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90664403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15042 + ... + 20188.

It is an arithmetic number, because the mean of its divisors is an integer number (7351344).

Almost surely, 2^90664405 is an apocalyptic number.

It is an amenable number.

90664405 is a deficient number, since it is larger than the sum of its proper divisors (26957099).

90664405 is a wasteful number, since it uses less digits than its factorization.

90664405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5436.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 90664405 is about 9521.7858093952. The cubic root of 90664405 is about 449.2405379119.

The spelling of 90664405 in words is "ninety million, six hundred sixty-four thousand, four hundred five".