266642674518 has 64 divisors (see below), whose sum is σ = 599402529792. Its totient is φ = 78381703680.

The previous prime is 266642674481. The next prime is 266642674531. The reversal of 266642674518 is 815476246662.

It is a super-2 number, since 2×266642674518² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29821 + ... + 730872.

It is an arithmetic number, because the mean of its divisors is an integer number (9365664528).

Almost surely, 2^266642674518 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266642674518, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (299701264896).

266642674518 is an abundant number, since it is smaller than the sum of its proper divisors (332759855274).

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

266642674518 is a wasteful number, since it uses less digits than its factorization.

266642674518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760869.

The product of its digits is 23224320, while the sum is 57.

The spelling of 266642674518 in words is "two hundred sixty-six billion, six hundred forty-two million, six hundred seventy-four thousand, five hundred eighteen".