7286661 has 6 divisors (see below), whose sum is σ = 10525190. Its totient is φ = 4857768.

The previous prime is 7286621. The next prime is 7286681. The reversal of 7286661 is 1666827.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 5832225 + 1454436 = 2415^2 + 1206^2 .

It is not a de Polignac number, because 7286661 - 2¹⁵ = 7253893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7286621) 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, 404806 + ... + 404823.

Almost surely, 2^7286661 is an apocalyptic number.

It is an amenable number.

7286661 is a deficient number, since it is larger than the sum of its proper divisors (3238529).

7286661 is a wasteful number, since it uses less digits than its factorization.

7286661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809635 (or 809632 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 7286661 is about 2699.3815958475. The cubic root of 7286661 is about 193.8695140535.

It can be divided in two parts, 72866 and 61, that added together give a palindrome (72927).

The spelling of 7286661 in words is "seven million, two hundred eighty-six thousand, six hundred sixty-one".