6623541 has 6 divisors (see below), whose sum is σ = 9567350. Its totient is φ = 4415688.

The previous prime is 6623531. The next prime is 6623549. The reversal of 6623541 is 1453266.

It can be written as a sum of positive squares in only one way, i.e., 3437316 + 3186225 = 1854^2 + 1785^2 .

It is not a de Polignac number, because 6623541 - 2⁷ = 6623413 is a prime.

It is a Duffinian number.

It is a Curzon number.

6623541 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6623549) 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, 367966 + ... + 367983.

Almost surely, 2^6623541 is an apocalyptic number.

It is an amenable number.

6623541 is a deficient number, since it is larger than the sum of its proper divisors (2943809).

6623541 is a wasteful number, since it uses less digits than its factorization.

6623541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735955 (or 735952 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 6623541 is about 2573.6240984262. The cubic root of 6623541 is about 187.8004994764.

The spelling of 6623541 in words is "six million, six hundred twenty-three thousand, five hundred forty-one".