66307606646 has 8 divisors (see below), whose sum is σ = 104696221080. Its totient is φ = 31408866288.

The previous prime is 66307606619. The next prime is 66307606661. The reversal of 66307606646 is 64660670366.

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

It is a junction number, because it is equal to n+sod(n) for n = 66307606594 and 66307606603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 872468471 + ... + 872468546.

It is an arithmetic number, because the mean of its divisors is an integer number (13087027635).

Almost surely, 2^66307606646 is an apocalyptic number.

66307606646 is a deficient number, since it is larger than the sum of its proper divisors (38388614434).

66307606646 is a wasteful number, since it uses less digits than its factorization.

66307606646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1744937038.

The product of its (nonzero) digits is 3919104, while the sum is 50.

The spelling of 66307606646 in words is "sixty-six billion, three hundred seven million, six hundred six thousand, six hundred forty-six".