6639374 has 8 divisors (see below), whose sum is σ = 11381808. Its totient is φ = 2845440.

The previous prime is 6639349. The next prime is 6639377. The reversal of 6639374 is 4739366.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×6639374² = 88162574223752, which contains 22 as substring.

It is a d-powerful number, because it can be written as 6 + 6⁸ + 3¹⁰ + 9² + 3¹⁴ + 7⁶ + 4 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6639377) 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, 237107 + ... + 237134.

It is an arithmetic number, because the mean of its divisors is an integer number (1422726).

Almost surely, 2^6639374 is an apocalyptic number.

6639374 is a deficient number, since it is larger than the sum of its proper divisors (4742434).

6639374 is a wasteful number, since it uses less digits than its factorization.

6639374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474250.

The product of its digits is 81648, while the sum is 38.

The square root of 6639374 is about 2576.6982749247. The cubic root of 6639374 is about 187.9500206663.

The spelling of 6639374 in words is "six million, six hundred thirty-nine thousand, three hundred seventy-four".