2661417 has 40 divisors (see below), whose sum is σ = 4530240. Its totient is φ = 1542240.

The previous prime is 2661413. The next prime is 2661419. The reversal of 2661417 is 7141662.

It is not a de Polignac number, because 2661417 - 2² = 2661413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661413) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 25788 + ... + 25890.

It is an arithmetic number, because the mean of its divisors is an integer number (113256).

2^2661417 is an apocalyptic number.

2661417 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2661417 is a deficient number, since it is larger than the sum of its proper divisors (1868823).

2661417 is a wasteful number, since it uses less digits than its factorization.

2661417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155 (or 146 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 2661417 is about 1631.3849944143. The cubic root of 2661417 is about 138.5811972019.

The spelling of 2661417 in words is "two million, six hundred sixty-one thousand, four hundred seventeen".