6663157 has 4 divisors (see below), whose sum is σ = 6743520. Its totient is φ = 6582796.

The previous prime is 6663121. The next prime is 6663179. The reversal of 6663157 is 7513666.

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: 7513666 = 2 ⋅3756833.

It is a cyclic number.

It is not a de Polignac number, because 6663157 - 2⁷ = 6663029 is a prime.

It is a super-2 number, since 2×6663157² = 88795322413298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6663257) 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, 40057 + ... + 40222.

It is an arithmetic number, because the mean of its divisors is an integer number (1685880).

Almost surely, 2^6663157 is an apocalyptic number.

It is an amenable number.

6663157 is a deficient number, since it is larger than the sum of its proper divisors (80363).

6663157 is an equidigital number, since it uses as much as digits as its factorization.

6663157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80362.

The product of its digits is 22680, while the sum is 34.

The square root of 6663157 is about 2581.3091639709. The cubic root of 6663157 is about 188.1741727510.

The spelling of 6663157 in words is "six million, six hundred sixty-three thousand, one hundred fifty-seven".