266634768428 has 24 divisors (see below), whose sum is σ = 536352029472. Its totient is φ = 113611509504.

The previous prime is 266634768409. The next prime is 266634768451. The reversal of 266634768428 is 824867436662.

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, 27517325 + ... + 27527012.

It is an arithmetic number, because the mean of its divisors is an integer number (22348001228).

Almost surely, 2^266634768428 is an apocalyptic number.

266634768428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

266634768428 is an abundant number, since it is smaller than the sum of its proper divisors (269717261044).

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

266634768428 is a wasteful number, since it uses less digits than its factorization.

266634768428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55044521 (or 55044519 counting only the distinct ones).

The product of its digits is 111476736, while the sum is 62.

The spelling of 266634768428 in words is "two hundred sixty-six billion, six hundred thirty-four million, seven hundred sixty-eight thousand, four hundred twenty-eight".