66420025611 has 8 divisors (see below), whose sum is σ = 88632097680. Its totient is φ = 44243985312.

The previous prime is 66420025583. The next prime is 66420025667. The reversal of 66420025611 is 11652002466.

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

It is not a de Polignac number, because 66420025611 - 2⁹ = 66420025099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66420025681) 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, 9003640 + ... + 9011013.

It is an arithmetic number, because the mean of its divisors is an integer number (11079012210).

Almost surely, 2^66420025611 is an apocalyptic number.

66420025611 is a deficient number, since it is larger than the sum of its proper divisors (22212072069).

66420025611 is a wasteful number, since it uses less digits than its factorization.

66420025611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18015885.

The product of its (nonzero) digits is 17280, while the sum is 33.

The spelling of 66420025611 in words is "sixty-six billion, four hundred twenty million, twenty-five thousand, six hundred eleven".