11990776266 has 48 divisors (see below), whose sum is σ = 30381958464. Its totient is φ = 3346261632.

The previous prime is 11990776261. The next prime is 11990776271. The reversal of 11990776266 is 66267709911.

11990776266 is a `hidden beast` number, since 1 + 1 + 9 + 9 + 0 + 7 + 7 + 626 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (11990776261) and next prime (11990776271).

It is a super-2 number, since 2×11990776266² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11990776261) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1101151 + ... + 1111986.

It is an arithmetic number, because the mean of its divisors is an integer number (632957468).

Almost surely, 2^11990776266 is an apocalyptic number.

11990776266 is an abundant number, since it is smaller than the sum of its proper divisors (18391182198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11990776266 is a wasteful number, since it uses less digits than its factorization.

11990776266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2213195 (or 2213192 counting only the distinct ones).

The product of its (nonzero) digits is 1714608, while the sum is 54.

The spelling of 11990776266 in words is "eleven billion, nine hundred ninety million, seven hundred seventy-six thousand, two hundred sixty-six".