66724628465 has 16 divisors (see below), whose sum is σ = 92486759040. Its totient is φ = 45672472320.

The previous prime is 66724628441. The next prime is 66724628471. The reversal of 66724628465 is 56482642766.

66724628465 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66724628465 - 2¹⁴ = 66724612081 is a prime.

It is a super-3 number, since 3×66724628465³ (a number of 33 digits) contains 333 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66724628465.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35680685 + ... + 35682554.

It is an arithmetic number, because the mean of its divisors is an integer number (5780422440).

Almost surely, 2^66724628465 is an apocalyptic number.

It is an amenable number.

66724628465 is a deficient number, since it is larger than the sum of its proper divisors (25762130575).

66724628465 is a wasteful number, since it uses less digits than its factorization.

66724628465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71363272.

The product of its digits is 23224320, while the sum is 56.

The spelling of 66724628465 in words is "sixty-six billion, seven hundred twenty-four million, six hundred twenty-eight thousand, four hundred sixty-five".