66501620067 has 8 divisors (see below), whose sum is σ = 88752402000. Its totient is φ = 44292625760.

The previous prime is 66501620063. The next prime is 66501620099. The reversal of 66501620067 is 76002610566.

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 66501620067 - 2² = 66501620063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66501620063) 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, 10443192 + ... + 10449557.

It is an arithmetic number, because the mean of its divisors is an integer number (11094050250).

Almost surely, 2^66501620067 is an apocalyptic number.

66501620067 is a deficient number, since it is larger than the sum of its proper divisors (22250781933).

66501620067 is a wasteful number, since it uses less digits than its factorization.

66501620067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20893813.

The product of its (nonzero) digits is 90720, while the sum is 39.

The spelling of 66501620067 in words is "sixty-six billion, five hundred one million, six hundred twenty thousand, sixty-seven".