6642076578 has 16 divisors (see below), whose sum is σ = 13285330560. Its totient is φ = 2213829296.

The previous prime is 6642076549. The next prime is 6642076603. The reversal of 6642076578 is 8756702466.

It is a self number, because there is not a number n which added to its sum of digits gives 6642076578.

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, 35488 + ... + 120596.

It is an arithmetic number, because the mean of its divisors is an integer number (830333160).

Almost surely, 2^6642076578 is an apocalyptic number.

6642076578 is an abundant number, since it is smaller than the sum of its proper divisors (6643253982).

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

6642076578 is a wasteful number, since it uses less digits than its factorization.

6642076578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98121.

The product of its (nonzero) digits is 3386880, while the sum is 51.

The square root of 6642076578 is about 81498.9360544050. The cubic root of 6642076578 is about 1879.7551908859.

The spelling of 6642076578 in words is "six billion, six hundred forty-two million, seventy-six thousand, five hundred seventy-eight".