5666261266137 has 4 divisors (see below), whose sum is σ = 7555015021520. Its totient is φ = 3777507510756.

The previous prime is 5666261266111. The next prime is 5666261266139. The reversal of 5666261266137 is 7316621626665.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 5666261266137 - 2¹² = 5666261262041 is a prime.

It is a super-2 number, since 2×5666261266137² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5666261266139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 944376877687 + ... + 944376877692.

It is an arithmetic number, because the mean of its divisors is an integer number (1888753755380).

Almost surely, 2^{5666261266137} is an apocalyptic number.

It is an amenable number.

5666261266137 is a deficient number, since it is larger than the sum of its proper divisors (1888753755383).

5666261266137 is a wasteful number, since it uses less digits than its factorization.

5666261266137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1888753755382.

The product of its digits is 19595520, while the sum is 57.

The spelling of 5666261266137 in words is "five trillion, six hundred sixty-six billion, two hundred sixty-one million, two hundred sixty-six thousand, one hundred thirty-seven".