66611002601 has 8 divisors (see below), whose sum is σ = 78256282944. Its totient is φ = 55897344720.

The previous prime is 66611002543. The next prime is 66611002637. The reversal of 66611002601 is 10620011666.

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 66611002601 - 2²⁶ = 66543893737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66611002681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232905461 + ... + 232905746.

It is an arithmetic number, because the mean of its divisors is an integer number (9782035368).

Almost surely, 2^66611002601 is an apocalyptic number.

It is an amenable number.

66611002601 is a deficient number, since it is larger than the sum of its proper divisors (11645280343).

66611002601 is a wasteful number, since it uses less digits than its factorization.

66611002601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465811231.

The product of its (nonzero) digits is 2592, while the sum is 29.

The spelling of 66611002601 in words is "sixty-six billion, six hundred eleven million, two thousand, six hundred one".