1366860686631 has 24 divisors (see below), whose sum is σ = 2004117118080. Its totient is φ = 828030595920.

The previous prime is 1366860686593. The next prime is 1366860686693.

1366860686631 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1366860686631 - 2¹⁰ = 1366860685607 is a prime.

It is a super-2 number, since 2×1366860686631² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1366860686531) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25171 + ... + 1653588.

It is an arithmetic number, because the mean of its divisors is an integer number (83504879920).

Almost surely, 2^{1366860686631} is an apocalyptic number.

1366860686631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1366860686631 is a deficient number, since it is larger than the sum of its proper divisors (637256431449).

1366860686631 is a wasteful number, since it uses less digits than its factorization.

1366860686631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1681027 (or 1681016 counting only the distinct ones).

The product of its (nonzero) digits is 26873856, while the sum is 60.

The spelling of 1366860686631 in words is "one trillion, three hundred sixty-six billion, eight hundred sixty million, six hundred eighty-six thousand, six hundred thirty-one".