6690157 has 4 divisors (see below), whose sum is σ = 6725376. Its totient is φ = 6654940.

The previous prime is 6690149. The next prime is 6690169. The reversal of 6690157 is 7510966.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6690157 - 2³ = 6690149 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 (6690107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17323 + ... + 17704.

It is an arithmetic number, because the mean of its divisors is an integer number (1681344).

Almost surely, 2^6690157 is an apocalyptic number.

It is an amenable number.

6690157 is a deficient number, since it is larger than the sum of its proper divisors (35219).

6690157 is a wasteful number, since it uses less digits than its factorization.

6690157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35218.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 6690157 is about 2586.5337809509. The cubic root of 6690157 is about 188.4279991534.

The spelling of 6690157 in words is "six million, six hundred ninety thousand, one hundred fifty-seven".