6616261 has 4 divisors (see below), whose sum is σ = 6664000. Its totient is φ = 6568524.

The previous prime is 6616231. The next prime is 6616271. The reversal of 6616261 is 1626166.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1626166 = 2 ⋅813083.

It is a cyclic number.

It is not a de Polignac number, because 6616261 - 2¹⁹ = 6091973 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6616231) 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, 23661 + ... + 23938.

It is an arithmetic number, because the mean of its divisors is an integer number (1666000).

Almost surely, 2^6616261 is an apocalyptic number.

It is an amenable number.

6616261 is a deficient number, since it is larger than the sum of its proper divisors (47739).

6616261 is a wasteful number, since it uses less digits than its factorization.

6616261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47738.

The product of its digits is 2592, while the sum is 28.

The square root of 6616261 is about 2572.2093616189. The cubic root of 6616261 is about 187.7316697855.

The spelling of 6616261 in words is "six million, six hundred sixteen thousand, two hundred sixty-one".