6640274 has 4 divisors (see below), whose sum is σ = 9960414. Its totient is φ = 3320136.

The previous prime is 6640241. The next prime is 6640289. The reversal of 6640274 is 4720466.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3553225 + 3087049 = 1885^2 + 1757^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1660067 + ... + 1660070.

Almost surely, 2^6640274 is an apocalyptic number.

6640274 is a deficient number, since it is larger than the sum of its proper divisors (3320140).

6640274 is a wasteful number, since it uses less digits than its factorization.

6640274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3320139.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 6640274 is about 2576.8729111076. The cubic root of 6640274 is about 187.9585128011.

The spelling of 6640274 in words is "six million, six hundred forty thousand, two hundred seventy-four".