66200013206523 has 48 divisors (see below), whose sum is σ = 114321161073600. Its totient is φ = 36113761474560.

The previous prime is 66200013206447. The next prime is 66200013206539. The reversal of 66200013206523 is 32560231000266.

66200013206523 is a `hidden beast` number, since 6 + 620 + 0 + 0 + 1 + 3 + 2 + 0 + 6 + 5 + 23 = 666.

It is not a de Polignac number, because 66200013206523 - 2²¹ = 66200011109371 is a prime.

It is a super-2 number, since 2×66200013206523² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66200013205523) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 203400718 + ... + 203725923.

It is an arithmetic number, because the mean of its divisors is an integer number (2381690855700).

Almost surely, 2^{66200013206523} is an apocalyptic number.

66200013206523 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

66200013206523 is a deficient number, since it is larger than the sum of its proper divisors (48121147867077).

66200013206523 is a wasteful number, since it uses less digits than its factorization.

66200013206523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407126772 (or 407126769 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

Adding to 66200013206523 its reverse (32560231000266), we get a palindrome (98760244206789).

The spelling of 66200013206523 in words is "sixty-six trillion, two hundred billion, thirteen million, two hundred six thousand, five hundred twenty-three".