2659978 has 8 divisors (see below), whose sum is σ = 3999168. Its totient is φ = 1326924.

The previous prime is 2659963. The next prime is 2659999. The reversal of 2659978 is 8799562.

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, 226 + ... + 2317.

It is an arithmetic number, because the mean of its divisors is an integer number (499896).

2^2659978 is an apocalyptic number.

2659978 is a deficient number, since it is larger than the sum of its proper divisors (1339190).

2659978 is a wasteful number, since it uses less digits than its factorization.

2659978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3068.

The product of its digits is 272160, while the sum is 46.

The square root of 2659978 is about 1630.9438984833. The cubic root of 2659978 is about 138.5562162369.

The spelling of 2659978 in words is "two million, six hundred fifty-nine thousand, nine hundred seventy-eight".