66163094433903 has 16 divisors (see below), whose sum is σ = 90369966607200. Its totient is φ = 43032496465920.

The previous prime is 66163094433901. The next prime is 66163094433911. The reversal of 66163094433903 is 30933449036166.

It is not a de Polignac number, because 66163094433903 - 2¹ = 66163094433901 is a prime.

It is a super-2 number, since 2×66163094433903² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66163094433901) 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, 10657503 + ... + 15681471.

It is an arithmetic number, because the mean of its divisors is an integer number (5648122912950).

Almost surely, 2^{66163094433903} is an apocalyptic number.

66163094433903 is a deficient number, since it is larger than the sum of its proper divisors (24206872173297).

66163094433903 is a wasteful number, since it uses less digits than its factorization.

66163094433903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5131082.

The product of its (nonzero) digits is 22674816, while the sum is 57.

The spelling of 66163094433903 in words is "sixty-six trillion, one hundred sixty-three billion, ninety-four million, four hundred thirty-three thousand, nine hundred three".