666166768011 has 24 divisors (see below), whose sum is σ = 993323735040. Its totient is φ = 429766484400.

The previous prime is 666166768009. The next prime is 666166768019. The reversal of 666166768011 is 110867661666.

It is not a de Polignac number, because 666166768011 - 2¹ = 666166768009 is a prime.

It is a super-2 number, since 2×666166768011² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (666166768019) 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, 9817960 + ... + 9885578.

It is an arithmetic number, because the mean of its divisors is an integer number (41388488960).

Almost surely, 2^666166768011 is an apocalyptic number.

666166768011 is a deficient number, since it is larger than the sum of its proper divisors (327156967029).

666166768011 is a wasteful number, since it uses less digits than its factorization.

666166768011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102967 (or 102964 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 666166768011 in words is "six hundred sixty-six billion, one hundred sixty-six million, seven hundred sixty-eight thousand, eleven".