265640436966 has 8 divisors (see below), whose sum is σ = 531280873944. Its totient is φ = 88546812320.

The previous prime is 265640436959. The next prime is 265640436973. The reversal of 265640436966 is 669634046562.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (265640436959) and next prime (265640436973).

It is a sphenic number, since it is the product of 3 distinct primes.

265640436966 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22136703075 + ... + 22136703086.

It is an arithmetic number, because the mean of its divisors is an integer number (66410109243).

Almost surely, 2^265640436966 is an apocalyptic number.

265640436966 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

265640436966 is a wasteful number, since it uses less digits than its factorization.

265640436966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44273406166.

The product of its (nonzero) digits is 33592320, while the sum is 57.

The spelling of 265640436966 in words is "two hundred sixty-five billion, six hundred forty million, four hundred thirty-six thousand, nine hundred sixty-six".