2665990 has 8 divisors (see below), whose sum is σ = 4798800. Its totient is φ = 1066392.

The previous prime is 2665973. The next prime is 2666021. The reversal of 2665990 is 995662.

It is a happy number.

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

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, 133290 + ... + 133309.

It is an arithmetic number, because the mean of its divisors is an integer number (599850).

2^2665990 is an apocalyptic number.

2665990 is a deficient number, since it is larger than the sum of its proper divisors (2132810).

2665990 is a wasteful number, since it uses less digits than its factorization.

2665990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266606.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 2665990 is about 1632.7859627030. The cubic root of 2665990 is about 138.6605245163.

It can be divided in two parts, 2665 and 990, that added together give a triangular number (3655 = T₈₅).

The spelling of 2665990 in words is "two million, six hundred sixty-five thousand, nine hundred ninety".