2566978 has 8 divisors (see below), whose sum is σ = 3857472. Its totient is φ = 1281156.

The previous prime is 2566939. The next prime is 2566981. The reversal of 2566978 is 8796652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1051 + ... + 2497.

It is an arithmetic number, because the mean of its divisors is an integer number (482184).

2^2566978 is an apocalyptic number.

2566978 is a deficient number, since it is larger than the sum of its proper divisors (1290494).

2566978 is a wasteful number, since it uses less digits than its factorization.

2566978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2336.

The product of its digits is 181440, while the sum is 43.

The square root of 2566978 is about 1602.1791410451. The cubic root of 2566978 is about 136.9222568488.

The spelling of 2566978 in words is "two million, five hundred sixty-six thousand, nine hundred seventy-eight".