6425661 has 8 divisors (see below), whose sum is σ = 9346464. Its totient is φ = 3894320.

The previous prime is 6425651. The next prime is 6425663. The reversal of 6425661 is 1665246.

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

It is a cyclic number.

It is not a de Polignac number, because 6425661 - 2⁶ = 6425597 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6425663) 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, 97326 + ... + 97391.

It is an arithmetic number, because the mean of its divisors is an integer number (1168308).

Almost surely, 2^6425661 is an apocalyptic number.

It is an amenable number.

6425661 is a deficient number, since it is larger than the sum of its proper divisors (2920803).

6425661 is a wasteful number, since it uses less digits than its factorization.

6425661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194731.

The product of its digits is 8640, while the sum is 30.

The square root of 6425661 is about 2534.8887549555. Note that the first 3 decimals coincide. The cubic root of 6425661 is about 185.9113637109.

The spelling of 6425661 in words is "six million, four hundred twenty-five thousand, six hundred sixty-one".