66437225173 has 8 divisors (see below), whose sum is σ = 76740324480. Its totient is φ = 56844684480.

The previous prime is 66437225147. The next prime is 66437225189. The reversal of 66437225173 is 37152273466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66437225173 - 2⁹ = 66437224661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66437225773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177639453 + ... + 177639826.

It is an arithmetic number, because the mean of its divisors is an integer number (9592540560).

Almost surely, 2^66437225173 is an apocalyptic number.

It is an amenable number.

66437225173 is a deficient number, since it is larger than the sum of its proper divisors (10303099307).

66437225173 is a wasteful number, since it uses less digits than its factorization.

66437225173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355279307.

The product of its digits is 1270080, while the sum is 46.

The spelling of 66437225173 in words is "sixty-six billion, four hundred thirty-seven million, two hundred twenty-five thousand, one hundred seventy-three".