66822599545 has 32 divisors (see below), whose sum is σ = 91810236672. Its totient is φ = 46309815552.

The previous prime is 66822599531. The next prime is 66822599581. The reversal of 66822599545 is 54599522866.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-66822599545 is a prime.

It is a super-3 number, since 3×66822599545³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 342439 + ... + 500908.

It is an arithmetic number, because the mean of its divisors is an integer number (2869069896).

Almost surely, 2^66822599545 is an apocalyptic number.

66822599545 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

66822599545 is a deficient number, since it is larger than the sum of its proper divisors (24987637127).

66822599545 is a wasteful number, since it uses less digits than its factorization.

66822599545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843441.

The product of its digits is 46656000, while the sum is 61.

The spelling of 66822599545 in words is "sixty-six billion, eight hundred twenty-two million, five hundred ninety-nine thousand, five hundred forty-five".