866155803537464 has 64 divisors (see below), whose sum is σ = 1788260680252800. Its totient is φ = 390023189257600.

The previous prime is 866155803537421. The next prime is 866155803537473. The reversal of 866155803537464 is 464735308551668.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 899038442 + ... + 900001350.

It is an arithmetic number, because the mean of its divisors is an integer number (27941573128950).

Almost surely, 2^{866155803537464} is an apocalyptic number.

It is an amenable number.

866155803537464 is an abundant number, since it is smaller than the sum of its proper divisors (922104876715336).

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

866155803537464 is a wasteful number, since it uses less digits than its factorization.

866155803537464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058564 (or 1058560 counting only the distinct ones).

The product of its (nonzero) digits is 1741824000, while the sum is 71.

The spelling of 866155803537464 in words is "eight hundred sixty-six trillion, one hundred fifty-five billion, eight hundred three million, five hundred thirty-seven thousand, four hundred sixty-four".