6665157 has 12 divisors (see below), whose sum is σ = 9959820. Its totient is φ = 4290048.

The previous prime is 6665123. The next prime is 6665159. The reversal of 6665157 is 7515666.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5239521 + 1425636 = 2289^2 + 1194^2 .

It is not a de Polignac number, because 6665157 - 2¹⁴ = 6648773 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6665159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12508 + ... + 13029.

It is an arithmetic number, because the mean of its divisors is an integer number (829985).

Almost surely, 2^6665157 is an apocalyptic number.

It is an amenable number.

6665157 is a deficient number, since it is larger than the sum of its proper divisors (3294663).

6665157 is a wasteful number, since it uses less digits than its factorization.

6665157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25572 (or 25569 counting only the distinct ones).

The product of its digits is 37800, while the sum is 36.

The square root of 6665157 is about 2581.6965352264. The cubic root of 6665157 is about 188.1929981965.

The spelling of 6665157 in words is "six million, six hundred sixty-five thousand, one hundred fifty-seven".