6466689252 has 18 divisors (see below), whose sum is σ = 16346353478. Its totient is φ = 2155563072.

The previous prime is 6466689241. The next prime is 6466689263. The reversal of 6466689252 is 2529866646.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6466689241) and next prime (6466689263).

It can be written as a sum of positive squares in only one way, i.e., 6273590436 + 193098816 = 79206^2 + 13896^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 89815093 + ... + 89815164.

Almost surely, 2^6466689252 is an apocalyptic number.

It is an amenable number.

6466689252 is an abundant number, since it is smaller than the sum of its proper divisors (9879664226).

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

6466689252 is a wasteful number, since it uses less digits than its factorization.

6466689252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179630267 (or 179630262 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 54.

The square root of 6466689252 is about 80415.7276408042. The cubic root of 6466689252 is about 1863.0620980007.

The spelling of 6466689252 in words is "six billion, four hundred sixty-six million, six hundred eighty-nine thousand, two hundred fifty-two".