6451680 has 48 divisors (see below), whose sum is σ = 20324304. Its totient is φ = 1720320.

The previous prime is 6451657. The next prime is 6451691. The reversal of 6451680 is 861546.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6241 + ... + 7200.

It is an arithmetic number, because the mean of its divisors is an integer number (423423).

Almost surely, 2^6451680 is an apocalyptic number.

6451680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6451680 is an abundant number, since it is smaller than the sum of its proper divisors (13872624).

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

6451680 is a wasteful number, since it uses less digits than its factorization.

6451680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13459 (or 13451 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 6451680 is about 2540.0157479827. The cubic root of 6451680 is about 186.1619585991.

The spelling of 6451680 in words is "six million, four hundred fifty-one thousand, six hundred eighty".