66015675121 has 8 divisors (see below), whose sum is σ = 72205138944. Its totient is φ = 59857551120.

The previous prime is 66015675113. The next prime is 66015675239. The reversal of 66015675121 is 12157651066.

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 66015675121 - 2³ = 66015675113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66015675101) 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, 7830546 + ... + 7838971.

It is an arithmetic number, because the mean of its divisors is an integer number (9025642368).

Almost surely, 2^66015675121 is an apocalyptic number.

It is an amenable number.

66015675121 is a deficient number, since it is larger than the sum of its proper divisors (6189463823).

66015675121 is a wasteful number, since it uses less digits than its factorization.

66015675121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15669911.

The product of its (nonzero) digits is 75600, while the sum is 40.

The spelling of 66015675121 in words is "sixty-six billion, fifteen million, six hundred seventy-five thousand, one hundred twenty-one".