211666276004 has 24 divisors (see below), whose sum is σ = 412847537760. Its totient is φ = 94365150336.

The previous prime is 211666276001. The next prime is 211666276007. The reversal of 211666276004 is 400672666112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (211666276001) and next prime (211666276007).

It is a super-2 number, since 2×211666276004² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (211666276001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81912902 + ... + 81915485.

It is an arithmetic number, because the mean of its divisors is an integer number (17201980740).

Almost surely, 2^211666276004 is an apocalyptic number.

It is an amenable number.

211666276004 is a deficient number, since it is larger than the sum of its proper divisors (201181261756).

211666276004 is a wasteful number, since it uses less digits than its factorization.

211666276004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163828427 (or 163828425 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 41.

The spelling of 211666276004 in words is "two hundred eleven billion, six hundred sixty-six million, two hundred seventy-six thousand, four".