266664440407008 has 96 divisors (see below), whose sum is σ = 800262775952640. Its totient is φ = 76164177761280.

The previous prime is 266664440407007. The next prime is 266664440407021. The reversal of 266664440407008 is 800704044466662.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×266664440407008² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266664440407007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64832398 + ... + 68822733.

It is an arithmetic number, because the mean of its divisors is an integer number (8336070582840).

Almost surely, 2^{266664440407008} is an apocalyptic number.

266664440407008 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

266664440407008 is an abundant number, since it is smaller than the sum of its proper divisors (533598335545632).

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

266664440407008 is a wasteful number, since it uses less digits than its factorization.

266664440407008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133658120 (or 133658112 counting only the distinct ones).

The product of its (nonzero) digits is 37158912, while the sum is 57.

The spelling of 266664440407008 in words is "two hundred sixty-six trillion, six hundred sixty-four billion, four hundred forty million, four hundred seven thousand, eight".