866761260057308 has 36 divisors (see below), whose sum is σ = 1924885395716472. Its totient is φ = 337699192229280.

The previous prime is 866761260057307. The next prime is 866761260057373. The reversal of 866761260057308 is 803750062167668.

It is a happy number.

It is a super-2 number, since 2×866761260057308² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866761260057307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 201011421791 + ... + 201011426102.

It is an arithmetic number, because the mean of its divisors is an integer number (53469038769902).

Almost surely, 2^{866761260057308} is an apocalyptic number.

It is an amenable number.

866761260057308 is an abundant number, since it is smaller than the sum of its proper divisors (1058124135659164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

866761260057308 is a wasteful number, since it uses less digits than its factorization.

866761260057308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402022847922 (or 402022847913 counting only the distinct ones).

The product of its (nonzero) digits is 121927680, while the sum is 65.

The spelling of 866761260057308 in words is "eight hundred sixty-six trillion, seven hundred sixty-one billion, two hundred sixty million, fifty-seven thousand, three hundred eight".