7256661 has 16 divisors (see below), whose sum is σ = 10160640. Its totient is φ = 4598000.

The previous prime is 7256657. The next prime is 7256681. The reversal of 7256661 is 1666527.

7256661 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 7256661 - 2² = 7256657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7256611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17110 + ... + 17528.

It is an arithmetic number, because the mean of its divisors is an integer number (635040).

Almost surely, 2^7256661 is an apocalyptic number.

It is an amenable number.

7256661 is a deficient number, since it is larger than the sum of its proper divisors (2903979).

7256661 is a wasteful number, since it uses less digits than its factorization.

7256661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696.

The product of its digits is 15120, while the sum is 33.

The square root of 7256661 is about 2693.8190362383. The cubic root of 7256661 is about 193.6030872427.

It can be divided in two parts, 72566 and 61, that added together give a palindrome (72627).

The spelling of 7256661 in words is "seven million, two hundred fifty-six thousand, six hundred sixty-one".