666828159 has 16 divisors (see below), whose sum is σ = 899950080. Its totient is φ = 439149600.

The previous prime is 666828157. The next prime is 666828181. The reversal of 666828159 is 951828666.

It is not a de Polignac number, because 666828159 - 2¹ = 666828157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666828157) 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, 145302 + ... + 149820.

It is an arithmetic number, because the mean of its divisors is an integer number (56246880).

Almost surely, 2^666828159 is an apocalyptic number.

666828159 is a deficient number, since it is larger than the sum of its proper divisors (233121921).

666828159 is a wasteful number, since it uses less digits than its factorization.

666828159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5110.

The product of its digits is 1244160, while the sum is 51.

The square root of 666828159 is about 25823.0160709395. The cubic root of 666828159 is about 873.6509973152.

The spelling of 666828159 in words is "six hundred sixty-six million, eight hundred twenty-eight thousand, one hundred fifty-nine".