90068665 has 8 divisors (see below), whose sum is σ = 108187848. Its totient is φ = 71984640.

The previous prime is 90068647. The next prime is 90068681. The reversal of 90068665 is 56686009.

It can be written as a sum of positive squares in 4 ways, for example, as 29041321 + 61027344 = 5389^2 + 7812^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 90068665 - 2¹³ = 90060473 is a prime.

It is a super-2 number, since 2×90068665² = 16224728829764450, which contains 22 as substring.

It is a Duffinian number.

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, 2776 + ... + 13705.

It is an arithmetic number, because the mean of its divisors is an integer number (13523481).

Almost surely, 2^90068665 is an apocalyptic number.

It is an amenable number.

90068665 is a deficient number, since it is larger than the sum of its proper divisors (18119183).

90068665 is a wasteful number, since it uses less digits than its factorization.

90068665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17579.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 90068665 is about 9490.4512537603. The cubic root of 90068665 is about 448.2544144459.

It can be divided in two parts, 9006 and 8665, that added together give a palindrome (17671).

The spelling of 90068665 in words is "ninety million, sixty-eight thousand, six hundred sixty-five".