286664466681 has 6 divisors (see below), whose sum is σ = 414070896330. Its totient is φ = 191109644448.

The previous prime is 286664466677. The next prime is 286664466721. The reversal of 286664466681 is 186664466682.

It can be written as a sum of positive squares in only one way, i.e., 254939157225 + 31725309456 = 504915^2 + 178116^2 .

It is not a de Polignac number, because 286664466681 - 2² = 286664466677 is a prime.

It is a super-2 number, since 2×286664466681² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (286664467681) 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, 15925803696 + ... + 15925803713.

It is an arithmetic number, because the mean of its divisors is an integer number (69011816055).

Almost surely, 2^286664466681 is an apocalyptic number.

It is an amenable number.

286664466681 is a deficient number, since it is larger than the sum of its proper divisors (127406429649).

286664466681 is a wasteful number, since it uses less digits than its factorization.

286664466681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31851607415 (or 31851607412 counting only the distinct ones).

The product of its digits is 95551488, while the sum is 63.

Subtracting from 286664466681 its reverse (186664466682), we obtain a palindrome (99999999999).

The spelling of 286664466681 in words is "two hundred eighty-six billion, six hundred sixty-four million, four hundred sixty-six thousand, six hundred eighty-one".