90077665 has 4 divisors (see below), whose sum is σ = 108093204. Its totient is φ = 72062128.

The previous prime is 90077639. The next prime is 90077677. The reversal of 90077665 is 56677009.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15272464 + 74805201 = 3908^2 + 8649^2 .

It is a cyclic number.

It is not a de Polignac number, because 90077665 - 2²¹ = 87980513 is a prime.

It is a super-2 number, since 2×90077665² = 16227971463704450, 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 3 ways as a sum of consecutive naturals, for example, 9007762 + ... + 9007771.

It is an arithmetic number, because the mean of its divisors is an integer number (27023301).

Almost surely, 2^90077665 is an apocalyptic number.

It is an amenable number.

90077665 is a deficient number, since it is larger than the sum of its proper divisors (18015539).

90077665 is a wasteful number, since it uses less digits than its factorization.

90077665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18015538.

The product of its (nonzero) digits is 79380, while the sum is 40.

The square root of 90077665 is about 9490.9254027202. The cubic root of 90077665 is about 448.2693443713.

The spelling of 90077665 in words is "ninety million, seventy-seven thousand, six hundred sixty-five".