2770661 has 4 divisors (see below), whose sum is σ = 2774400. Its totient is φ = 2766924.

The previous prime is 2770639. The next prime is 2770667. The reversal of 2770661 is 1660772.

2770661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2770661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2770667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 341 + ... + 2378.

It is an arithmetic number, because the mean of its divisors is an integer number (693600).

2^2770661 is an apocalyptic number.

It is an amenable number.

2770661 is a deficient number, since it is larger than the sum of its proper divisors (3739).

2770661 is a wasteful number, since it uses less digits than its factorization.

2770661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3738.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 2770661 is about 1664.5302640685. The cubic root of 2770661 is about 140.4519577558.

The spelling of 2770661 in words is "two million, seven hundred seventy thousand, six hundred sixty-one".