2661017 has 4 divisors (see below), whose sum is σ = 2685540. Its totient is φ = 2636496.

The previous prime is 2661013. The next prime is 2661067. The reversal of 2661017 is 7101662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7101662 = 2 ⋅3550831.

It can be written as a sum of positive squares in 2 ways, for example, as 1175056 + 1485961 = 1084^2 + 1219^2 .

It is a cyclic number.

It is not a de Polignac number, because 2661017 - 2² = 2661013 is a prime.

It is a super-2 number, since 2×2661017² = 14162022948578, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2660983 and 2661001.

It is not an unprimeable number, because it can be changed into a prime (2661013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12098 + ... + 12315.

It is an arithmetic number, because the mean of its divisors is an integer number (671385).

2^2661017 is an apocalyptic number.

It is an amenable number.

2661017 is a deficient number, since it is larger than the sum of its proper divisors (24523).

2661017 is a wasteful number, since it uses less digits than its factorization.

2661017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24522.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 2661017 is about 1631.2623945889. The cubic root of 2661017 is about 138.5742541266.

Adding to 2661017 its reverse (7101662), we get a palindrome (9762679).

The spelling of 2661017 in words is "two million, six hundred sixty-one thousand, seventeen".