266590836436990 has 64 divisors (see below), whose sum is σ = 528035251968000. Its totient is φ = 96299579211264.

The previous prime is 266590836436823. The next prime is 266590836436999. The reversal of 266590836436990 is 99634638095662.

It is a Smith number, since the sum of its digits (76) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266590836436999) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53028670 + ... + 57837889.

It is an arithmetic number, because the mean of its divisors is an integer number (8250550812000).

Almost surely, 2^{266590836436990} is an apocalyptic number.

266590836436990 is a deficient number, since it is larger than the sum of its proper divisors (261444415531010).

266590836436990 is a wasteful number, since it uses less digits than its factorization.

266590836436990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110866981.

The product of its (nonzero) digits is 2720977920, while the sum is 76.

The spelling of 266590836436990 in words is "two hundred sixty-six trillion, five hundred ninety billion, eight hundred thirty-six million, four hundred thirty-six thousand, nine hundred ninety".