266381852087 has 16 divisors (see below), whose sum is σ = 303787838592. Its totient is φ = 231396134400.

The previous prime is 266381852069. The next prime is 266381852159. The reversal of 266381852087 is 780258183662.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 266381852087 - 2²² = 266377657783 is a prime.

It is a super-2 number, since 2×266381852087² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266381852587) 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, 1681373 + ... + 1832969.

It is an arithmetic number, because the mean of its divisors is an integer number (18986739912).

Almost surely, 2^266381852087 is an apocalyptic number.

266381852087 is a deficient number, since it is larger than the sum of its proper divisors (37405986505).

266381852087 is a wasteful number, since it uses less digits than its factorization.

266381852087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159578.

The product of its (nonzero) digits is 7741440, while the sum is 56.

The spelling of 266381852087 in words is "two hundred sixty-six billion, three hundred eighty-one million, eight hundred fifty-two thousand, eighty-seven".