265456666551 has 16 divisors (see below), whose sum is σ = 358647449600. Its totient is φ = 174621309408.

The previous prime is 265456666547. The next prime is 265456666567. The reversal of 265456666551 is 155666654562.

It is a happy number.

It is not a de Polignac number, because 265456666551 - 2² = 265456666547 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 265456666491 and 265456666500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265456666351) 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, 27810 + ... + 729168.

It is an arithmetic number, because the mean of its divisors is an integer number (22415465600).

Almost surely, 2^265456666551 is an apocalyptic number.

265456666551 is a deficient number, since it is larger than the sum of its proper divisors (93190783049).

265456666551 is a wasteful number, since it uses less digits than its factorization.

265456666551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703038.

The product of its digits is 38880000, while the sum is 57.

The spelling of 265456666551 in words is "two hundred sixty-five billion, four hundred fifty-six million, six hundred sixty-six thousand, five hundred fifty-one".