66605602311 has 12 divisors (see below), whose sum is σ = 96298782840. Its totient is φ = 44361877680.

The previous prime is 66605602307. The next prime is 66605602337. The reversal of 66605602311 is 11320650666.

It is not a de Polignac number, because 66605602311 - 2² = 66605602307 is a prime.

It is a super-2 number, since 2×66605602311² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66605602391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3478021 + ... + 3497118.

It is an arithmetic number, because the mean of its divisors is an integer number (8024898570).

Almost surely, 2^66605602311 is an apocalyptic number.

66605602311 is a deficient number, since it is larger than the sum of its proper divisors (29693180529).

66605602311 is a wasteful number, since it uses less digits than its factorization.

66605602311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6976206 (or 6976203 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The spelling of 66605602311 in words is "sixty-six billion, six hundred five million, six hundred two thousand, three hundred eleven".