66450350023 has 12 divisors (see below), whose sum is σ = 71642716072. Its totient is φ = 61608032640.

The previous prime is 66450350003. The next prime is 66450350101. The reversal of 66450350023 is 32005305466.

It is not a de Polignac number, because 66450350023 - 2¹⁷ = 66450218951 is a prime.

It is a super-2 number, since 2×66450350023² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66450350003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1696548 + ... + 1735273.

Almost surely, 2^66450350023 is an apocalyptic number.

66450350023 is a deficient number, since it is larger than the sum of its proper divisors (5192366049).

66450350023 is a wasteful number, since it uses less digits than its factorization.

66450350023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3431922 (or 3431905 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 34.

Adding to 66450350023 its reverse (32005305466), we get a palindrome (98455655489).

The spelling of 66450350023 in words is "sixty-six billion, four hundred fifty million, three hundred fifty thousand, twenty-three".