6663251 has 4 divisors (see below), whose sum is σ = 7615152. Its totient is φ = 5711352.

The previous prime is 6663229. The next prime is 6663257. The reversal of 6663251 is 1523666.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1523666 = 2 ⋅761833.

It is a cyclic number.

It is not a de Polignac number, because 6663251 - 2¹⁴ = 6646867 is a prime.

It is a Duffinian 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, 475940 + ... + 475953.

It is an arithmetic number, because the mean of its divisors is an integer number (1903788).

Almost surely, 2^6663251 is an apocalyptic number.

6663251 is a deficient number, since it is larger than the sum of its proper divisors (951901).

6663251 is an equidigital number, since it uses as much as digits as its factorization.

6663251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951900.

The product of its digits is 6480, while the sum is 29.

The square root of 6663251 is about 2581.3273717218. The cubic root of 6663251 is about 188.1750576313.

The spelling of 6663251 in words is "six million, six hundred sixty-three thousand, two hundred fifty-one".