66265567915 has 32 divisors (see below), whose sum is σ = 85049150976. Its totient is φ = 49473607680.

The previous prime is 66265567891. The next prime is 66265567919. The reversal of 66265567915 is 51976556266.

It is not a de Polignac number, because 66265567915 - 2⁷ = 66265567787 is a prime.

It is a super-2 number, since 2×66265567915² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66265567915.

It is not an unprimeable number, because it can be changed into a prime (66265567919) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 596929 + ... + 699181.

It is an arithmetic number, because the mean of its divisors is an integer number (2657785968).

Almost surely, 2^66265567915 is an apocalyptic number.

66265567915 is a deficient number, since it is larger than the sum of its proper divisors (18783583061).

66265567915 is a wasteful number, since it uses less digits than its factorization.

66265567915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102439.

The product of its digits is 20412000, while the sum is 58.

The spelling of 66265567915 in words is "sixty-six billion, two hundred sixty-five million, five hundred sixty-seven thousand, nine hundred fifteen".