2660786 has 4 divisors (see below), whose sum is σ = 3991182. Its totient is φ = 1330392.

The previous prime is 2660783. The next prime is 2660803. The reversal of 2660786 is 6870662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6870662 = 2 ⋅3435331.

It can be written as a sum of positive squares in only one way, i.e., 2660161 + 625 = 1631^2 + 25^2 .

It is not an unprimeable number, because it can be changed into a prime (2660783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665195 + ... + 665198.

2^2660786 is an apocalyptic number.

2660786 is a deficient number, since it is larger than the sum of its proper divisors (1330396).

2660786 is a wasteful number, since it uses less digits than its factorization.

2660786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330395.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 2660786 is about 1631.1915889925. The cubic root of 2660786 is about 138.5702441836.

The spelling of 2660786 in words is "two million, six hundred sixty thousand, seven hundred eighty-six".