266645928379 has 4 divisors (see below), whose sum is σ = 266649197184. Its totient is φ = 266642659576.

The previous prime is 266645928377. The next prime is 266645928383. The reversal of 266645928379 is 973829546662.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 266645928379 - 2¹ = 266645928377 is a prime.

It is a super-2 number, since 2×266645928379² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266645928377) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1508827 + ... + 1676260.

It is an arithmetic number, because the mean of its divisors is an integer number (66662299296).

Almost surely, 2^266645928379 is an apocalyptic number.

266645928379 is a deficient number, since it is larger than the sum of its proper divisors (3268805).

266645928379 is an equidigital number, since it uses as much as digits as its factorization.

266645928379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3268804.

The product of its digits is 235146240, while the sum is 67.

The spelling of 266645928379 in words is "two hundred sixty-six billion, six hundred forty-five million, nine hundred twenty-eight thousand, three hundred seventy-nine".