666835371 has 12 divisors (see below), whose sum is σ = 965275272. Its totient is φ = 443602176.

The previous prime is 666835361. The next prime is 666835391. The reversal of 666835371 is 173538666.

It is not a de Polignac number, because 666835371 - 2¹⁸ = 666573227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (666835361) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 75126 + ... + 83531.

It is an arithmetic number, because the mean of its divisors is an integer number (80439606).

Almost surely, 2^666835371 is an apocalyptic number.

666835371 is a deficient number, since it is larger than the sum of its proper divisors (298439901).

666835371 is a wasteful number, since it uses less digits than its factorization.

666835371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159130 (or 159127 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 666835371 is about 25823.1557134290. The cubic root of 666835371 is about 873.6541469264.

The spelling of 666835371 in words is "six hundred sixty-six million, eight hundred thirty-five thousand, three hundred seventy-one".