6666575666157 has 48 divisors (see below), whose sum is σ = 10773695961600. Its totient is φ = 3937396690080.

The previous prime is 6666575666083. The next prime is 6666575666237. The reversal of 6666575666157 is 7516665756666.

It is not a de Polignac number, because 6666575666157 - 2¹⁶ = 6666575600621 is a prime.

It is a super-2 number, since 2×6666575666157² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6666575666057) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 85194 + ... + 3652452.

It is an arithmetic number, because the mean of its divisors is an integer number (224451999200).

Almost surely, 2^{6666575666157} is an apocalyptic number.

It is an amenable number.

6666575666157 is a deficient number, since it is larger than the sum of its proper divisors (4107120295443).

6666575666157 is a wasteful number, since it uses less digits than its factorization.

6666575666157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3567758 (or 3567755 counting only the distinct ones).

The product of its digits is 1714608000, while the sum is 72.

The spelling of 6666575666157 in words is "six trillion, six hundred sixty-six billion, five hundred seventy-five million, six hundred sixty-six thousand, one hundred fifty-seven".