2661023 has 6 divisors (see below), whose sum is σ = 2729232. Its totient is φ = 2594480.

The previous prime is 2661013. The next prime is 2661067. The reversal of 2661023 is 3201662.

It is not a de Polignac number, because 2661023 - 2⁸ = 2660767 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2660986 and 2661004.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 890 + ... + 2472.

It is an arithmetic number, because the mean of its divisors is an integer number (454872).

2^2661023 is an apocalyptic number.

2661023 is a deficient number, since it is larger than the sum of its proper divisors (68209).

2661023 is an equidigital number, since it uses as much as digits as its factorization.

2661023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1665 (or 1624 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 2661023 is about 1631.2642336544. The cubic root of 2661023 is about 138.5743582778.

Adding to 2661023 its reverse (3201662), we get a palindrome (5862685).

The spelling of 2661023 in words is "two million, six hundred sixty-one thousand, twenty-three".