6466689251 has 32 divisors (see below), whose sum is σ = 7321190400. Its totient is φ = 5661532800.

The previous prime is 6466689241. The next prime is 6466689263. The reversal of 6466689251 is 1529866646.

It is a de Polignac number, because none of the positive numbers 2^k-6466689251 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6466689193 and 6466689202.

It is not an unprimeable number, because it can be changed into a prime (6466689221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9782861 + ... + 9783521.

It is an arithmetic number, because the mean of its divisors is an integer number (228787200).

Almost surely, 2^6466689251 is an apocalyptic number.

6466689251 is a deficient number, since it is larger than the sum of its proper divisors (854501149).

6466689251 is a wasteful number, since it uses less digits than its factorization.

6466689251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995.

The product of its digits is 3732480, while the sum is 53.

The square root of 6466689251 is about 80415.7276345865. The cubic root of 6466689251 is about 1863.0620979047.

The spelling of 6466689251 in words is "six billion, four hundred sixty-six million, six hundred eighty-nine thousand, two hundred fifty-one".