866072905505 has 16 divisors (see below), whose sum is σ = 1044928304640. Its totient is φ = 689100240192.

The previous prime is 866072905499. The next prime is 866072905513. The reversal of 866072905505 is 505509270668.

It is a cyclic number.

It is not a de Polignac number, because 866072905505 - 2⁸ = 866072905249 is a prime.

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, 2691416 + ... + 2995974.

It is an arithmetic number, because the mean of its divisors is an integer number (65308019040).

Almost surely, 2^866072905505 is an apocalyptic number.

It is an amenable number.

866072905505 is a deficient number, since it is larger than the sum of its proper divisors (178855399135).

866072905505 is a wasteful number, since it uses less digits than its factorization.

866072905505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307648.

The product of its (nonzero) digits is 4536000, while the sum is 53.

The spelling of 866072905505 in words is "eight hundred sixty-six billion, seventy-two million, nine hundred five thousand, five hundred five".