11666667890 has 64 divisors (see below), whose sum is σ = 22102502400. Its totient is φ = 4425383424.

The previous prime is 11666667827. The next prime is 11666667899. The reversal of 11666667890 is 9876666611.

It is a happy number.

It is a super-2 number, since 2×11666667890² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11666667899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20503526 + ... + 20504094.

It is an arithmetic number, because the mean of its divisors is an integer number (345351600).

Almost surely, 2^11666667890 is an apocalyptic number.

11666667890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11666667890 is a deficient number, since it is larger than the sum of its proper divisors (10435834510).

11666667890 is a wasteful number, since it uses less digits than its factorization.

11666667890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1211.

The product of its (nonzero) digits is 3919104, while the sum is 56.

The spelling of 11666667890 in words is "eleven billion, six hundred sixty-six million, six hundred sixty-seven thousand, eight hundred ninety".