2666661031413 has 6 divisors (see below), whose sum is σ = 3851843712054. Its totient is φ = 1777774020936.

The previous prime is 2666661031367. The next prime is 2666661031487. The reversal of 2666661031413 is 3141301666662.

It can be written as a sum of positive squares in only one way, i.e., 2589244646769 + 77416384644 = 1609113^2 + 278238^2 .

It is not a de Polignac number, because 2666661031413 - 2²⁶ = 2666593922549 is a prime.

It is a super-2 number, since 2×2666661031413² (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 (2666661031493) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 148147835070 + ... + 148147835087.

It is an arithmetic number, because the mean of its divisors is an integer number (641973952009).

Almost surely, 2^{2666661031413} is an apocalyptic number.

It is an amenable number.

2666661031413 is a deficient number, since it is larger than the sum of its proper divisors (1185182680641).

2666661031413 is a wasteful number, since it uses less digits than its factorization.

2666661031413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296295670163 (or 296295670160 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 45.

The spelling of 2666661031413 in words is "two trillion, six hundred sixty-six billion, six hundred sixty-one million, thirty-one thousand, four hundred thirteen".