6475661 has 4 divisors (see below), whose sum is σ = 6481500. Its totient is φ = 6469824.

The previous prime is 6475649. The next prime is 6475669. The reversal of 6475661 is 1665746.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 624100 + 5851561 = 790^2 + 2419^2 .

It is a cyclic number.

It is not a de Polignac number, because 6475661 - 2⁶ = 6475597 is a prime.

It is a d-powerful number, because it can be written as 6⁴ + 4¹¹ + 7³ + 5⁹ + 6⁶ + 6⁷ + 1 .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6475669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 686 + ... + 3663.

It is an arithmetic number, because the mean of its divisors is an integer number (1620375).

Almost surely, 2^6475661 is an apocalyptic number.

It is an amenable number.

6475661 is a deficient number, since it is larger than the sum of its proper divisors (5839).

6475661 is a wasteful number, since it uses less digits than its factorization.

6475661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5838.

The product of its digits is 30240, while the sum is 35.

The square root of 6475661 is about 2544.7320094658. The cubic root of 6475661 is about 186.3923290850.

The spelling of 6475661 in words is "six million, four hundred seventy-five thousand, six hundred sixty-one".