2660247 has 24 divisors (see below), whose sum is σ = 4143360. Its totient is φ = 1639440.

The previous prime is 2660237. The next prime is 2660291. The reversal of 2660247 is 7420662.

It is not a de Polignac number, because 2660247 - 2⁶ = 2660183 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2660247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2660237) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7872 + ... + 8202.

It is an arithmetic number, because the mean of its divisors is an integer number (172640).

2^2660247 is an apocalyptic number.

2660247 is a deficient number, since it is larger than the sum of its proper divisors (1483113).

2660247 is a wasteful number, since it uses less digits than its factorization.

2660247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403 (or 400 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 2660247 is about 1631.0263639807. The cubic root of 2660247 is about 138.5608867475.

The spelling of 2660247 in words is "two million, six hundred sixty thousand, two hundred forty-seven".