866786514038397 has 6 divisors (see below), whose sum is σ = 1252024964722142. Its totient is φ = 577857676025592.

The previous prime is 866786514038371. The next prime is 866786514038399. The reversal of 866786514038397 is 793830415687668.

866786514038397 is a `hidden beast` number, since 8 + 6 + 6 + 7 + 8 + 6 + 5 + 140 + 383 + 97 = 666.

It can be written as a sum of positive squares in only one way, i.e., 835273234396836 + 31513279641561 = 28901094^2 + 5613669^2 .

It is not a de Polignac number, because 866786514038397 - 2¹¹ = 866786514036349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866786514038399) 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, 48154806335458 + ... + 48154806335475.

Almost surely, 2^{866786514038397} is an apocalyptic number.

It is an amenable number.

866786514038397 is a deficient number, since it is larger than the sum of its proper divisors (385238450683745).

866786514038397 is a wasteful number, since it uses less digits than its factorization.

866786514038397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96309612670939 (or 96309612670936 counting only the distinct ones).

The product of its (nonzero) digits is 8778792960, while the sum is 81.

The spelling of 866786514038397 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, five hundred fourteen million, thirty-eight thousand, three hundred ninety-seven".