266406037856 has 48 divisors (see below), whose sum is σ = 609240068640. Its totient is φ = 112302305280.

The previous prime is 266406037841. The next prime is 266406037889. The reversal of 266406037856 is 658730604662.

It is a super-2 number, since 2×266406037856² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 266406037798 and 266406037807.

It is a congruent number.

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, 9734801 + ... + 9762128.

It is an arithmetic number, because the mean of its divisors is an integer number (12692501430).

Almost surely, 2^266406037856 is an apocalyptic number.

It is an amenable number.

266406037856 is an abundant number, since it is smaller than the sum of its proper divisors (342834030784).

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

266406037856 is a wasteful number, since it uses less digits than its factorization.

266406037856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19497007 (or 19496999 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 53.

The spelling of 266406037856 in words is "two hundred sixty-six billion, four hundred six million, thirty-seven thousand, eight hundred fifty-six".