66146240240563 has 16 divisors (see below), whose sum is σ = 77205239193600. Its totient is φ = 55489660204896.

The previous prime is 66146240240477. The next prime is 66146240240599. The reversal of 66146240240563 is 36504204264166.

It is a cyclic number.

It is not a de Polignac number, because 66146240240563 - 2¹⁷ = 66146240109491 is a prime.

It is a super-2 number, since 2×66146240240563² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66146240240963) 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, 21891838 + ... + 24729436.

It is an arithmetic number, because the mean of its divisors is an integer number (4825327449600).

Almost surely, 2^{66146240240563} is an apocalyptic number.

66146240240563 is a deficient number, since it is larger than the sum of its proper divisors (11058998953037).

66146240240563 is a wasteful number, since it uses less digits than its factorization.

66146240240563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2908506.

The product of its (nonzero) digits is 4976640, while the sum is 49.

The spelling of 66146240240563 in words is "sixty-six trillion, one hundred forty-six billion, two hundred forty million, two hundred forty thousand, five hundred sixty-three".