2666390 has 16 divisors (see below), whose sum is σ = 5008608. Its totient is φ = 1020096.

The previous prime is 2666383. The next prime is 2666393. The reversal of 2666390 is 936662.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2666393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5567 + ... + 6026.

It is an arithmetic number, because the mean of its divisors is an integer number (313038).

2^2666390 is an apocalyptic number.

2666390 is a deficient number, since it is larger than the sum of its proper divisors (2342218).

2666390 is a wasteful number, since it uses less digits than its factorization.

2666390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11623.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 2666390 is about 1632.9084481379. The cubic root of 2666390 is about 138.6674589555.

The spelling of 2666390 in words is "two million, six hundred sixty-six thousand, three hundred ninety".