2661590 has 8 divisors (see below), whose sum is σ = 4790880. Its totient is φ = 1064632.

The previous prime is 2661569. The next prime is 2661611. The reversal of 2661590 is 951662.

2661590 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2661569) and next prime (2661611).

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

It is a super-2 number, since 2×2661590² = 14168122656200, which contains 22 as substring.

It is a Curzon number.

It is a nialpdrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133070 + ... + 133089.

It is an arithmetic number, because the mean of its divisors is an integer number (598860).

2^2661590 is an apocalyptic number.

2661590 is a deficient number, since it is larger than the sum of its proper divisors (2129290).

2661590 is a wasteful number, since it uses less digits than its factorization.

2661590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266166.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 2661590 is about 1631.4380159847. The cubic root of 2661590 is about 138.5841998665.

It can be divided in two parts, 26 and 61590, that added together give a palindrome (61616).

The spelling of 2661590 in words is "two million, six hundred sixty-one thousand, five hundred ninety".