90665121273 has 8 divisors (see below), whose sum is σ = 120888589536. Its totient is φ = 60442533600.

The previous prime is 90665121233. The next prime is 90665121347. The reversal of 90665121273 is 37212156609.

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

It is not a de Polignac number, because 90665121273 - 2⁸ = 90665121017 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (90665121233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77638 + ... + 432848.

It is an arithmetic number, because the mean of its divisors is an integer number (15111073692).

Almost surely, 2^90665121273 is an apocalyptic number.

It is an amenable number.

90665121273 is a deficient number, since it is larger than the sum of its proper divisors (30223468263).

90665121273 is a wasteful number, since it uses less digits than its factorization.

90665121273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440295.

The product of its (nonzero) digits is 136080, while the sum is 42.

The spelling of 90665121273 in words is "ninety billion, six hundred sixty-five million, one hundred twenty-one thousand, two hundred seventy-three".