166890344395 has 16 divisors (see below), whose sum is σ = 206240832000. Its totient is φ = 129587953248.

The previous prime is 166890344333. The next prime is 166890344483. The reversal of 166890344395 is 593443098661.

It is a cyclic number.

It is not a de Polignac number, because 166890344395 - 2¹¹ = 166890342347 is a prime.

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, 3557265 + ... + 3603874.

It is an arithmetic number, because the mean of its divisors is an integer number (12890052000).

Almost surely, 2^166890344395 is an apocalyptic number.

166890344395 is a deficient number, since it is larger than the sum of its proper divisors (39350487605).

166890344395 is an equidigital number, since it uses as much as digits as its factorization.

166890344395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7161282.

The product of its (nonzero) digits is 16796160, while the sum is 58.

The spelling of 166890344395 in words is "one hundred sixty-six billion, eight hundred ninety million, three hundred forty-four thousand, three hundred ninety-five".