66645020346 has 64 divisors (see below), whose sum is σ = 138482749440. Its totient is φ = 21359278080.

The previous prime is 66645020327. The next prime is 66645020353. The reversal of 66645020346 is 64302054666.

It is a junction number, because it is equal to n+sod(n) for n = 66645020298 and 66645020307.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 24782970 + ... + 24785658.

It is an arithmetic number, because the mean of its divisors is an integer number (2163792960).

Almost surely, 2^66645020346 is an apocalyptic number.

66645020346 is an abundant number, since it is smaller than the sum of its proper divisors (71837729094).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66645020346 is a wasteful number, since it uses less digits than its factorization.

66645020346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3539.

The product of its (nonzero) digits is 622080, while the sum is 42.

The spelling of 66645020346 in words is "sixty-six billion, six hundred forty-five million, twenty thousand, three hundred forty-six".