7668157 has 6 divisors (see below), whose sum is σ = 8920158. Its totient is φ = 6572664.

The previous prime is 7668149. The next prime is 7668161. The reversal of 7668157 is 7518667.

It can be written as a sum of positive squares in only one way, i.e., 7338681 + 329476 = 2709^2 + 574^2 .

It is not a de Polignac number, because 7668157 - 2³ = 7668149 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 (7668137) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 78198 + ... + 78295.

It is an arithmetic number, because the mean of its divisors is an integer number (1486693).

Almost surely, 2^7668157 is an apocalyptic number.

It is an amenable number.

7668157 is a deficient number, since it is larger than the sum of its proper divisors (1252001).

7668157 is a wasteful number, since it uses less digits than its factorization.

7668157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156507 (or 156500 counting only the distinct ones).

The product of its digits is 70560, while the sum is 40.

The square root of 7668157 is about 2769.1437304698. The cubic root of 7668157 is about 197.1954993645.

The spelling of 7668157 in words is "seven million, six hundred sixty-eight thousand, one hundred fifty-seven".