66778108001 has 8 divisors (see below), whose sum is σ = 74083572000. Its totient is φ = 59678431840.

The previous prime is 66778107967. The next prime is 66778108013. The reversal of 66778108001 is 10080187766.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66778108001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66778105001) 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, 51446276 + ... + 51447573.

It is an arithmetic number, because the mean of its divisors is an integer number (9260446500).

Almost surely, 2^66778108001 is an apocalyptic number.

It is an amenable number.

66778108001 is a deficient number, since it is larger than the sum of its proper divisors (7305463999).

66778108001 is a wasteful number, since it uses less digits than its factorization.

66778108001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102893919.

The product of its (nonzero) digits is 112896, while the sum is 44.

The spelling of 66778108001 in words is "sixty-six billion, seven hundred seventy-eight million, one hundred eight thousand, one".