7665541 has 8 divisors (see below), whose sum is σ = 8540280. Its totient is φ = 6831552.

The previous prime is 7665533. The next prime is 7665547. The reversal of 7665541 is 1455667.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1833316 + 5832225 = 1354^2 + 2415^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7665541 - 2³ = 7665533 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 7665497 and 7665506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7665547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9790 + ... + 10543.

It is an arithmetic number, because the mean of its divisors is an integer number (1067535).

Almost surely, 2^7665541 is an apocalyptic number.

It is an amenable number.

7665541 is a deficient number, since it is larger than the sum of its proper divisors (874739).

7665541 is a wasteful number, since it uses less digits than its factorization.

7665541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20375.

The product of its digits is 25200, while the sum is 34.

The square root of 7665541 is about 2768.6713419978. The cubic root of 7665541 is about 197.1730723284.

The spelling of 7665541 in words is "seven million, six hundred sixty-five thousand, five hundred forty-one".