90105666699 has 16 divisors (see below), whose sum is σ = 122408558208. Its totient is φ = 58943588352.

The previous prime is 90105666691. The next prime is 90105666713. The reversal of 90105666699 is 99666650109.

It is not a de Polignac number, because 90105666699 - 2³ = 90105666691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90105666691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 820497 + ... + 923810.

It is an arithmetic number, because the mean of its divisors is an integer number (7650534888).

Almost surely, 2^90105666699 is an apocalyptic number.

90105666699 is a deficient number, since it is larger than the sum of its proper divisors (32302891509).

90105666699 is a wasteful number, since it uses less digits than its factorization.

90105666699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1744634.

The product of its (nonzero) digits is 4723920, while the sum is 57.

The spelling of 90105666699 in words is "ninety billion, one hundred five million, six hundred sixty-six thousand, six hundred ninety-nine".