853751661 has 8 divisors (see below), whose sum is σ = 1300954944. Its totient is φ = 487858080.

The previous prime is 853751659. The next prime is 853751671. The reversal of 853751661 is 166157358.

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

It is not a de Polignac number, because 853751661 - 2¹ = 853751659 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (853751621) 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, 20327400 + ... + 20327441.

It is an arithmetic number, because the mean of its divisors is an integer number (162619368).

Almost surely, 2^853751661 is an apocalyptic number.

It is an amenable number.

853751661 is a deficient number, since it is larger than the sum of its proper divisors (447203283).

853751661 is a wasteful number, since it uses less digits than its factorization.

853751661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40654851.

The product of its digits is 151200, while the sum is 42.

The square root of 853751661 is about 29219.0290906457. The cubic root of 853751661 is about 948.6598503430.

The spelling of 853751661 in words is "eight hundred fifty-three million, seven hundred fifty-one thousand, six hundred sixty-one".