266001216664 has 96 divisors (see below), whose sum is σ = 545318917920. Its totient is φ = 121133657088.

The previous prime is 266001216661. The next prime is 266001216667. The reversal of 266001216664 is 466612100662.

It is an interprime number because it is at equal distance from previous prime (266001216661) and next prime (266001216667).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266001216661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 250235797 + ... + 250236859.

It is an arithmetic number, because the mean of its divisors is an integer number (5680405395).

Almost surely, 2^266001216664 is an apocalyptic number.

It is an amenable number.

266001216664 is an abundant number, since it is smaller than the sum of its proper divisors (279317701256).

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

266001216664 is a wasteful number, since it uses less digits than its factorization.

266001216664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1569 (or 1342 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

The spelling of 266001216664 in words is "two hundred sixty-six billion, one million, two hundred sixteen thousand, six hundred sixty-four".