866761276138100 has 36 divisors (see below), whose sum is σ = 2149567964824224. Its totient is φ = 297175294675680.

The previous prime is 866761276138097. The next prime is 866761276138103. The reversal of 866761276138100 is 1831672167668.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (866761276138097) and next prime (866761276138103).

It is a super-2 number, since 2×866761276138100² (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 (866761276138103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 619115196542 + ... + 619115197941.

Almost surely, 2^{866761276138100} is an apocalyptic number.

It is an amenable number.

866761276138100 is an abundant number, since it is smaller than the sum of its proper divisors (1282806688686124).

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

866761276138100 is a wasteful number, since it uses less digits than its factorization.

866761276138100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1238230394504 (or 1238230394497 counting only the distinct ones).

The product of its (nonzero) digits is 24385536, while the sum is 62.

The spelling of 866761276138100 in words is "eight hundred sixty-six trillion, seven hundred sixty-one billion, two hundred seventy-six million, one hundred thirty-eight thousand, one hundred".