628667766826 has 16 divisors (see below), whose sum is σ = 1033144227648. Its totient is φ = 284531644000.

The previous prime is 628667766803. The next prime is 628667766827.

628667766826 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×628667766826² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (628667766827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61316350 + ... + 61326601.

It is an arithmetic number, because the mean of its divisors is an integer number (64571514228).

Almost surely, 2^628667766826 is an apocalyptic number.

628667766826 is a deficient number, since it is larger than the sum of its proper divisors (404476460822).

628667766826 is a wasteful number, since it uses less digits than its factorization.

628667766826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122643197.

The product of its digits is 585252864, while the sum is 70.

The spelling of 628667766826 in words is "six hundred twenty-eight billion, six hundred sixty-seven million, seven hundred sixty-six thousand, eight hundred twenty-six".