866761260057272 has 16 divisors (see below), whose sum is σ = 1625209851960240. Its totient is φ = 433371966201216.

The previous prime is 866761260057263. The next prime is 866761260057281. The reversal of 866761260057272 is 272750062167668.

It is an interprime number because it is at equal distance from previous prime (866761260057263) and next prime (866761260057281).

It is a junction number, because it is equal to n+sod(n) for n = 866761260057199 and 866761260057208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1082553233 + ... + 1083353600.

It is an arithmetic number, because the mean of its divisors is an integer number (101575615747515).

Almost surely, 2^{866761260057272} is an apocalyptic number.

It is an amenable number.

866761260057272 is a deficient number, since it is larger than the sum of its proper divisors (758448591902968).

866761260057272 is a wasteful number, since it uses less digits than its factorization.

866761260057272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2165956862 (or 2165956858 counting only the distinct ones).

The product of its (nonzero) digits is 142248960, while the sum is 65.

The spelling of 866761260057272 in words is "eight hundred sixty-six trillion, seven hundred sixty-one billion, two hundred sixty million, fifty-seven thousand, two hundred seventy-two".