2556670 has 8 divisors (see below), whose sum is σ = 4602024. Its totient is φ = 1022664.

The previous prime is 2556661. The next prime is 2556683. The reversal of 2556670 is 766552.

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

It is a super-2 number, since 2×2556670² = 13073122977800, which contains 22 as substring.

It is a congruent number.

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, 127824 + ... + 127843.

It is an arithmetic number, because the mean of its divisors is an integer number (575253).

2^2556670 is an apocalyptic number.

2556670 is a deficient number, since it is larger than the sum of its proper divisors (2045354).

2556670 is a wasteful number, since it uses less digits than its factorization.

2556670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255674.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 2556670 is about 1598.9590363734. The cubic root of 2556670 is about 136.7387352064.

The spelling of 2556670 in words is "two million, five hundred fifty-six thousand, six hundred seventy".