866111026450 has 48 divisors (see below), whose sum is σ = 1681282676736. Its totient is φ = 331327568000.

The previous prime is 866111026423. The next prime is 866111026471. The reversal of 866111026450 is 54620111668.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7385775 + ... + 7502125.

It is an arithmetic number, because the mean of its divisors is an integer number (35026722432).

Almost surely, 2^866111026450 is an apocalyptic number.

866111026450 is a deficient number, since it is larger than the sum of its proper divisors (815171650286).

866111026450 is a wasteful number, since it uses less digits than its factorization.

866111026450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122859 (or 122854 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The spelling of 866111026450 in words is "eight hundred sixty-six billion, one hundred eleven million, twenty-six thousand, four hundred fifty".