7657641 has 6 divisors (see below), whose sum is σ = 11061050. Its totient is φ = 5105088.

The previous prime is 7657613. The next prime is 7657679. The reversal of 7657641 is 1467567.

7657641 is a `hidden beast` number, since 7 + 6 + 5 + 7 + 641 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5978025 + 1679616 = 2445^2 + 1296^2 .

It is not a de Polignac number, because 7657641 - 2⁵ = 7657609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7657596 and 7657605.

It is not an unprimeable number, because it can be changed into a prime (7657691) 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, 425416 + ... + 425433.

Almost surely, 2^7657641 is an apocalyptic number.

It is an amenable number.

7657641 is a deficient number, since it is larger than the sum of its proper divisors (3403409).

7657641 is a wasteful number, since it uses less digits than its factorization.

7657641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850855 (or 850852 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 7657641 is about 2767.2442971303. The cubic root of 7657641 is about 197.1053144371.

The spelling of 7657641 in words is "seven million, six hundred fifty-seven thousand, six hundred forty-one".