2566766 has 4 divisors (see below), whose sum is σ = 3850152. Its totient is φ = 1283382.

The previous prime is 2566757. The next prime is 2566771. The reversal of 2566766 is 6676652.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 641690 + ... + 641693.

It is an arithmetic number, because the mean of its divisors is an integer number (962538).

2^2566766 is an apocalyptic number.

2566766 is a deficient number, since it is larger than the sum of its proper divisors (1283386).

2566766 is a wasteful number, since it uses less digits than its factorization.

2566766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1283385.

The product of its digits is 90720, while the sum is 38.

The square root of 2566766 is about 1602.1129797864. The cubic root of 2566766 is about 136.9184873947.

The spelling of 2566766 in words is "two million, five hundred sixty-six thousand, seven hundred sixty-six".