2660749 has 12 divisors (see below), whose sum is σ = 3334044. Its totient is φ = 2104704.

The previous prime is 2660743. The next prime is 2660753. The reversal of 2660749 is 9470662.

It can be written as a sum of positive squares in 2 ways, for example, as 1483524 + 1177225 = 1218^2 + 1085^2 .

It is not a de Polignac number, because 2660749 - 2⁷ = 2660621 is a prime.

It is an Ulam number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2660743) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1452 + ... + 2725.

It is an arithmetic number, because the mean of its divisors is an integer number (277837).

2^2660749 is an apocalyptic number.

It is an amenable number.

2660749 is a deficient number, since it is larger than the sum of its proper divisors (673295).

2660749 is a wasteful number, since it uses less digits than its factorization.

2660749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4204 (or 4197 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 2660749 is about 1631.1802475508. The cubic root of 2660749 is about 138.5696018768.

The spelling of 2660749 in words is "two million, six hundred sixty thousand, seven hundred forty-nine".