6642277452 has 48 divisors (see below), whose sum is σ = 17228468320. Its totient is φ = 2213096256.

The previous prime is 6642277427. The next prime is 6642277487. The reversal of 6642277452 is 2547722466.

It is a happy number.

It is a super-2 number, since 2×6642277452² = 88239699498695224608, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6642277398 and 6642277407.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 250578 + ... + 275814.

Almost surely, 2^6642277452 is an apocalyptic number.

It is an amenable number.

6642277452 is an abundant number, since it is smaller than the sum of its proper divisors (10586190868).

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

6642277452 is a wasteful number, since it uses less digits than its factorization.

6642277452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27687 (or 27679 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 45.

The square root of 6642277452 is about 81500.1684170039. The cubic root of 6642277452 is about 1879.7741402879.

The spelling of 6642277452 in words is "six billion, six hundred forty-two million, two hundred seventy-seven thousand, four hundred fifty-two".