266672293906 has 24 divisors (see below), whose sum is σ = 406730816100. Its totient is φ = 131130976896.

The previous prime is 266672293813. The next prime is 266672293907. The reversal of 266672293906 is 609392276662.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 139550809225 + 127121484681 = 373565^2 + 356541^2 .

It is a super-2 number, since 2×266672293906² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (266672293907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3683796 + ... + 3755488.

Almost surely, 2^266672293906 is an apocalyptic number.

266672293906 is a deficient number, since it is larger than the sum of its proper divisors (140058522194).

266672293906 is an equidigital number, since it uses as much as digits as its factorization.

266672293906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72190 (or 72117 counting only the distinct ones).

The product of its (nonzero) digits is 17635968, while the sum is 58.

The spelling of 266672293906 in words is "two hundred sixty-six billion, six hundred seventy-two million, two hundred ninety-three thousand, nine hundred six".