8661157 has 8 divisors (see below), whose sum is σ = 8842176. Its totient is φ = 8481792.

The previous prime is 8661137. The next prime is 8661161. The reversal of 8661157 is 7511668.

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

It is a cyclic number.

It is not a de Polignac number, because 8661157 - 2²³ = 272549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8661137) 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, 16968 + ... + 17470.

It is an arithmetic number, because the mean of its divisors is an integer number (1105272).

Almost surely, 2^8661157 is an apocalyptic number.

It is an amenable number.

8661157 is a deficient number, since it is larger than the sum of its proper divisors (181019).

8661157 is a wasteful number, since it uses less digits than its factorization.

8661157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827.

The product of its digits is 10080, while the sum is 34.

The square root of 8661157 is about 2942.9843696493. The cubic root of 8661157 is about 205.3644676347.

It can be divided in two parts, 86611 and 57, that added together give a palindrome (86668).

The spelling of 8661157 in words is "eight million, six hundred sixty-one thousand, one hundred fifty-seven".