6638012676 has 81 divisors (see below), whose sum is σ = 17292293109. Its totient is φ = 2147002848.

The previous prime is 6638012669. The next prime is 6638012723. The reversal of 6638012676 is 6762108366.

The square root of 6638012676 is 81474.

It is a perfect power (a square), and thus also a powerful number.

6638012676 is a `hidden beast` number, since 6 + 6 + 380 + 1 + 267 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5939784900 + 698227776 = 77070^2 + 26424^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 18087045 + ... + 18087411.

Almost surely, 2^6638012676 is an apocalyptic number.

6638012676 is the 81474-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6638012676

6638012676 is an abundant number, since it is smaller than the sum of its proper divisors (10654280433).

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

6638012676 is a wasteful number, since it uses less digits than its factorization.

6638012676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818 (or 409 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The cubic root of 6638012676 is about 1879.3717415583.

The spelling of 6638012676 in words is "six billion, six hundred thirty-eight million, twelve thousand, six hundred seventy-six".