6451660 has 12 divisors (see below), whose sum is σ = 13548528. Its totient is φ = 2580656.

The previous prime is 6451657. The next prime is 6451691. The reversal of 6451660 is 661546.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161272 + ... + 161311.

It is an arithmetic number, because the mean of its divisors is an integer number (1129044).

Almost surely, 2^6451660 is an apocalyptic number.

It is an amenable number.

6451660 is an abundant number, since it is smaller than the sum of its proper divisors (7096868).

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

6451660 is a wasteful number, since it uses less digits than its factorization.

6451660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322592 (or 322590 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 6451660 is about 2540.0118109962. The cubic root of 6451660 is about 186.1617662335.

The spelling of 6451660 in words is "six million, four hundred fifty-one thousand, six hundred sixty".