6521887466 has 16 divisors (see below), whose sum is σ = 10094603400. Its totient is φ = 3158181120.

The previous prime is 6521887457. The next prime is 6521887481. The reversal of 6521887466 is 6647881256.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4566921241 + 1954966225 = 67579^2 + 44215^2 .

It is a super-2 number, since 2×6521887466² = 85070032238335802312, which contains 22 as substring.

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, 279041 + ... + 301508.

Almost surely, 2^6521887466 is an apocalyptic number.

6521887466 is a deficient number, since it is larger than the sum of its proper divisors (3572715934).

6521887466 is a wasteful number, since it uses less digits than its factorization.

6521887466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580729.

The product of its digits is 3870720, while the sum is 53.

The square root of 6521887466 is about 80758.2037071157. The cubic root of 6521887466 is about 1868.3479805804.

The spelling of 6521887466 in words is "six billion, five hundred twenty-one million, eight hundred eighty-seven thousand, four hundred sixty-six".