840166449 has 8 divisors (see below), whose sum is σ = 1127740800. Its totient is φ = 556351536.

The previous prime is 840166447. The next prime is 840166477. The reversal of 840166449 is 944661048.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 840166449 - 2¹ = 840166447 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 840166449.

It is not an unprimeable number, because it can be changed into a prime (840166447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 939337 + ... + 940230.

It is an arithmetic number, because the mean of its divisors is an integer number (140967600).

Almost surely, 2^840166449 is an apocalyptic number.

It is an amenable number.

840166449 is a deficient number, since it is larger than the sum of its proper divisors (287574351).

840166449 is a wasteful number, since it uses less digits than its factorization.

840166449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1879719.

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 840166449 is about 28985.6248681998. The cubic root of 840166449 is about 943.6011138081.

The spelling of 840166449 in words is "eight hundred forty million, one hundred sixty-six thousand, four hundred forty-nine".