66291000870 has 32 divisors (see below), whose sum is σ = 159252791040. Its totient is φ = 17660445920.

The previous prime is 66291000857. The next prime is 66291000877. The reversal of 66291000870 is 7800019266.

66291000870 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66291000877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1040700 + ... + 1102559.

It is an arithmetic number, because the mean of its divisors is an integer number (4976649720).

Almost surely, 2^66291000870 is an apocalyptic number.

66291000870 is an abundant number, since it is smaller than the sum of its proper divisors (92961790170).

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

66291000870 is a wasteful number, since it uses less digits than its factorization.

66291000870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2144300.

The product of its (nonzero) digits is 36288, while the sum is 39.

The spelling of 66291000870 in words is "sixty-six billion, two hundred ninety-one million, eight hundred seventy", and thus it is an aban number.