54664166729 has 4 divisors (see below), whose sum is σ = 54664638660. Its totient is φ = 54663694800.

The previous prime is 54664166717. The next prime is 54664166747. The reversal of 54664166729 is 92766146645.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 92766146645 = 5 ⋅18553229329.

It can be written as a sum of positive squares in 2 ways, for example, as 40754323129 + 13909843600 = 201877^2 + 117940^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54664166729 is a prime.

It is a super-2 number, since 2×54664166729² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54664166749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70187 + ... + 338015.

It is an arithmetic number, because the mean of its divisors is an integer number (13666159665).

Almost surely, 2^54664166729 is an apocalyptic number.

It is an amenable number.

54664166729 is a deficient number, since it is larger than the sum of its proper divisors (471931).

54664166729 is a wasteful number, since it uses less digits than its factorization.

54664166729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471930.

The product of its digits is 13063680, while the sum is 56.

The spelling of 54664166729 in words is "fifty-four billion, six hundred sixty-four million, one hundred sixty-six thousand, seven hundred twenty-nine".