90066779 has 16 divisors (see below), whose sum is σ = 102060000. Its totient is φ = 78731520.

The previous prime is 90066751. The next prime is 90066787. The reversal of 90066779 is 97766009.

It is not a de Polignac number, because 90066779 - 2¹⁶ = 90001243 is a prime.

It is a super-2 number, since 2×90066779² = 16224049358869682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90066719) 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, 110927 + ... + 111735.

It is an arithmetic number, because the mean of its divisors is an integer number (6378750).

Almost surely, 2^90066779 is an apocalyptic number.

90066779 is a deficient number, since it is larger than the sum of its proper divisors (11993221).

90066779 is a wasteful number, since it uses less digits than its factorization.

90066779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1198.

The product of its (nonzero) digits is 142884, while the sum is 44.

The square root of 90066779 is about 9490.3518902093. The cubic root of 90066779 is about 448.2512856710.

The spelling of 90066779 in words is "ninety million, sixty-six thousand, seven hundred seventy-nine".