266140751651 has 4 divisors (see below), whose sum is σ = 266151945192. Its totient is φ = 266129558112.

The previous prime is 266140751641. The next prime is 266140751659. The reversal of 266140751651 is 156157041662.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-266140751651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266140751659) 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, 5561030 + ... + 5608683.

It is an arithmetic number, because the mean of its divisors is an integer number (66537986298).

Almost surely, 2^266140751651 is an apocalyptic number.

266140751651 is a deficient number, since it is larger than the sum of its proper divisors (11193541).

266140751651 is a wasteful number, since it uses less digits than its factorization.

266140751651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11193540.

The product of its (nonzero) digits is 302400, while the sum is 44.

The spelling of 266140751651 in words is "two hundred sixty-six billion, one hundred forty million, seven hundred fifty-one thousand, six hundred fifty-one".