6685157 has 4 divisors (see below), whose sum is σ = 6975840. Its totient is φ = 6394476.

The previous prime is 6685141. The next prime is 6685163. The reversal of 6685157 is 7515866.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 7515866 = 2 ⋅3757933.

It is a cyclic number.

It is not a de Polignac number, because 6685157 - 2⁴ = 6685141 is a prime.

It is a super-2 number, since 2×6685157² = 89382648229298, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6685157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6685117) 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, 145307 + ... + 145352.

It is an arithmetic number, because the mean of its divisors is an integer number (1743960).

Almost surely, 2^6685157 is an apocalyptic number.

It is an amenable number.

6685157 is a deficient number, since it is larger than the sum of its proper divisors (290683).

6685157 is a wasteful number, since it uses less digits than its factorization.

6685157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290682.

The product of its digits is 50400, while the sum is 38.

The square root of 6685157 is about 2585.5670557926. The cubic root of 6685157 is about 188.3810458556.

The spelling of 6685157 in words is "six million, six hundred eighty-five thousand, one hundred fifty-seven".