2664779 has 4 divisors (see below), whose sum is σ = 2869776. Its totient is φ = 2459784.

The previous prime is 2664763. The next prime is 2664793. The reversal of 2664779 is 9774662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9774662 = 2 ⋅4887331.

It is a cyclic number.

It is not a de Polignac number, because 2664779 - 2⁴ = 2664763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2664709) 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, 102479 + ... + 102504.

It is an arithmetic number, because the mean of its divisors is an integer number (717444).

2^2664779 is an apocalyptic number.

2664779 is a deficient number, since it is larger than the sum of its proper divisors (204997).

2664779 is a wasteful number, since it uses less digits than its factorization.

2664779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204996.

The product of its digits is 127008, while the sum is 41.

The square root of 2664779 is about 1632.4150820181. The cubic root of 2664779 is about 138.6395262722.

It can be divided in two parts, 2664 and 779, that added together give a palindrome (3443).

The spelling of 2664779 in words is "two million, six hundred sixty-four thousand, seven hundred seventy-nine".