66663324354561 has 32 divisors (see below), whose sum is σ = 97842517194240. Its totient is φ = 40037957635200.

The previous prime is 66663324354547. The next prime is 66663324354623. The reversal of 66663324354561 is 16545342336666.

It is not a de Polignac number, because 66663324354561 - 2¹⁰ = 66663324353537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66663324354495 and 66663324354504.

It is not an unprimeable number, because it can be changed into a prime (66663324354061) 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, 18922551 + ... + 22167308.

It is an arithmetic number, because the mean of its divisors is an integer number (3057578662320).

Almost surely, 2^{66663324354561} is an apocalyptic number.

It is an amenable number.

66663324354561 is a deficient number, since it is larger than the sum of its proper divisors (31179192839679).

66663324354561 is a wasteful number, since it uses less digits than its factorization.

66663324354561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41090317.

The product of its digits is 167961600, while the sum is 60.

The spelling of 66663324354561 in words is "sixty-six trillion, six hundred sixty-three billion, three hundred twenty-four million, three hundred fifty-four thousand, five hundred sixty-one".