266664440407015 has 64 divisors (see below), whose sum is σ = 372191863680000. Its totient is φ = 179620060354560.

The previous prime is 266664440407007. The next prime is 266664440407021. The reversal of 266664440407015 is 510704044466662.

It is not a de Polignac number, because 266664440407015 - 2³ = 266664440407007 is a prime.

It is a super-2 number, since 2×266664440407015² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18455556511 + ... + 18455570959.

It is an arithmetic number, because the mean of its divisors is an integer number (5815497870000).

Almost surely, 2^{266664440407015} is an apocalyptic number.

266664440407015 is a deficient number, since it is larger than the sum of its proper divisors (105527423272985).

266664440407015 is a wasteful number, since it uses less digits than its factorization.

266664440407015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20680.

The product of its (nonzero) digits is 23224320, while the sum is 55.

The spelling of 266664440407015 in words is "two hundred sixty-six trillion, six hundred sixty-four billion, four hundred forty million, four hundred seven thousand, fifteen".