866133034236428 has 72 divisors (see below), whose sum is σ = 1788689824588800. Its totient is φ = 365850156645792.

The previous prime is 866133034236427. The next prime is 866133034236469. The reversal of 866133034236428 is 824632430331668.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (866133034236427) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40960388 + ... + 58395371.

It is an arithmetic number, because the mean of its divisors is an integer number (24842914230400).

Almost surely, 2^{866133034236428} is an apocalyptic number.

It is an amenable number.

866133034236428 is an abundant number, since it is smaller than the sum of its proper divisors (922556790352372).

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

866133034236428 is a wasteful number, since it uses less digits than its factorization.

866133034236428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99356419 (or 99356410 counting only the distinct ones).

The product of its (nonzero) digits is 71663616, while the sum is 59.

The spelling of 866133034236428 in words is "eight hundred sixty-six trillion, one hundred thirty-three billion, thirty-four million, two hundred thirty-six thousand, four hundred twenty-eight".