666646132611 has 16 divisors (see below), whose sum is σ = 910600363008. Its totient is φ = 433562740800.

The previous prime is 666646132609. The next prime is 666646132631. The reversal of 666646132611 is 116231646666.

It is not a de Polignac number, because 666646132611 - 2¹ = 666646132609 is a prime.

It is a super-2 number, since 2×666646132611² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (666646132631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1810246 + ... + 2147156.

It is an arithmetic number, because the mean of its divisors is an integer number (56912522688).

Almost surely, 2^666646132611 is an apocalyptic number.

666646132611 is a deficient number, since it is larger than the sum of its proper divisors (243954230397).

666646132611 is a wasteful number, since it uses less digits than its factorization.

666646132611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353042.

The product of its digits is 1119744, while the sum is 48.

The spelling of 666646132611 in words is "six hundred sixty-six billion, six hundred forty-six million, one hundred thirty-two thousand, six hundred eleven".