866416140877388 has 48 divisors (see below), whose sum is σ = 1519208811993600. Its totient is φ = 432357491638464.

The previous prime is 866416140877379. The next prime is 866416140877457. The reversal of 866416140877388 is 883778041614668.

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, 24684906263 + ... + 24684941361.

It is an arithmetic number, because the mean of its divisors is an integer number (31650183583200).

Almost surely, 2^{866416140877388} is an apocalyptic number.

It is an amenable number.

866416140877388 is a deficient number, since it is larger than the sum of its proper divisors (652792671116212).

866416140877388 is a wasteful number, since it uses less digits than its factorization.

866416140877388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41966 (or 41964 counting only the distinct ones).

The product of its (nonzero) digits is 2080899072, while the sum is 77.

The spelling of 866416140877388 in words is "eight hundred sixty-six trillion, four hundred sixteen billion, one hundred forty million, eight hundred seventy-seven thousand, three hundred eighty-eight".