866514132073656 has 128 divisors (see below), whose sum is σ = 2664991451462400. Its totient is φ = 258660934899840.

The previous prime is 866514132073607. The next prime is 866514132073657. The reversal of 866514132073656 is 656370231415668.

866514132073656 is a `hidden beast` number, since 8 + 6 + 6 + 5 + 1 + 413 + 207 + 3 + 6 + 5 + 6 = 666.

It is a super-2 number, since 2×866514132073656² (a number of 31 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 866514132073593 and 866514132073602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866514132073657) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2721441555 + ... + 2721759938.

It is an arithmetic number, because the mean of its divisors is an integer number (20820245714550).

Almost surely, 2^{866514132073656} is an apocalyptic number.

It is an amenable number.

866514132073656 is an abundant number, since it is smaller than the sum of its proper divisors (1798477319388744).

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

866514132073656 is a wasteful number, since it uses less digits than its factorization.

866514132073656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5443201586 (or 5443201576 counting only the distinct ones).

The product of its (nonzero) digits is 130636800, while the sum is 63.

The spelling of 866514132073656 in words is "eight hundred sixty-six trillion, five hundred fourteen billion, one hundred thirty-two million, seventy-three thousand, six hundred fifty-six".