6451085066 has 4 divisors (see below), whose sum is σ = 9676627602. Its totient is φ = 3225542532.

The previous prime is 6451085059. The next prime is 6451085071. The reversal of 6451085066 is 6605801546.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6404640841 + 46444225 = 80029^2 + 6815^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1612771265 + ... + 1612771268.

Almost surely, 2^6451085066 is an apocalyptic number.

6451085066 is a deficient number, since it is larger than the sum of its proper divisors (3225542536).

6451085066 is a wasteful number, since it uses less digits than its factorization.

6451085066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3225542535.

The product of its (nonzero) digits is 172800, while the sum is 41.

The square root of 6451085066 is about 80318.6470628085. The cubic root of 6451085066 is about 1861.5623618865.

The spelling of 6451085066 in words is "six billion, four hundred fifty-one million, eighty-five thousand, sixty-six".