7628661 has 20 divisors (see below), whose sum is σ = 11617452. Its totient is φ = 4987008.

The previous prime is 7628659. The next prime is 7628681. The reversal of 7628661 is 1668267.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4704561 + 2924100 = 2169^2 + 1710^2 .

It is not a de Polignac number, because 7628661 - 2¹ = 7628659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7628681) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3405 + ... + 5181.

Almost surely, 2^7628661 is an apocalyptic number.

It is an amenable number.

7628661 is a deficient number, since it is larger than the sum of its proper divisors (3988791).

7628661 is a wasteful number, since it uses less digits than its factorization.

7628661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1842 (or 1833 counting only the distinct ones).

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

The square root of 7628661 is about 2762.0030774784. The cubic root of 7628661 is about 196.8563546968.

The spelling of 7628661 in words is "seven million, six hundred twenty-eight thousand, six hundred sixty-one".