66930173758 has 16 divisors (see below), whose sum is σ = 114800840064. Its totient is φ = 28668510360.

The previous prime is 66930173749. The next prime is 66930173759. The reversal of 66930173758 is 85737103966.

It is a junction number, because it is equal to n+sod(n) for n = 66930173699 and 66930173708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66930173759) 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, 1294560 + ... + 1345267.

It is an arithmetic number, because the mean of its divisors is an integer number (7175052504).

Almost surely, 2^66930173758 is an apocalyptic number.

66930173758 is a deficient number, since it is larger than the sum of its proper divisors (47870666306).

66930173758 is a wasteful number, since it uses less digits than its factorization.

66930173758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2641647.

The product of its (nonzero) digits is 5715360, while the sum is 55.

The spelling of 66930173758 in words is "sixty-six billion, nine hundred thirty million, one hundred seventy-three thousand, seven hundred fifty-eight".