6451656 has 16 divisors (see below), whose sum is σ = 16129200. Its totient is φ = 2150544.

The previous prime is 6451649. The next prime is 6451657. The reversal of 6451656 is 6561546.

It is not an unprimeable number, because it can be changed into a prime (6451657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134386 + ... + 134433.

It is an arithmetic number, because the mean of its divisors is an integer number (1008075).

Almost surely, 2^6451656 is an apocalyptic number.

It is an amenable number.

6451656 is an abundant number, since it is smaller than the sum of its proper divisors (9677544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6451656 is a wasteful number, since it uses less digits than its factorization.

6451656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268828 (or 268824 counting only the distinct ones).

The product of its digits is 21600, while the sum is 33.

The square root of 6451656 is about 2540.0110235981. The cubic root of 6451656 is about 186.1617277604.

The spelling of 6451656 in words is "six million, four hundred fifty-one thousand, six hundred fifty-six".