66125615370 has 32 divisors (see below), whose sum is σ = 159078470400. Its totient is φ = 17591609280.

The previous prime is 66125615321. The next prime is 66125615371. The reversal of 66125615370 is 7351652166.

It is a super-2 number, since 2×66125615370² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66125615371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2605170 + ... + 2630429.

It is an arithmetic number, because the mean of its divisors is an integer number (4971202200).

Almost surely, 2^66125615370 is an apocalyptic number.

66125615370 is an abundant number, since it is smaller than the sum of its proper divisors (92952855030).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66125615370 is a wasteful number, since it uses less digits than its factorization.

66125615370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5236030.

The product of its (nonzero) digits is 226800, while the sum is 42.

The spelling of 66125615370 in words is "sixty-six billion, one hundred twenty-five million, six hundred fifteen thousand, three hundred seventy".