66701335645 has 16 divisors (see below), whose sum is σ = 93707244288. Its totient is φ = 44622495360.

The previous prime is 66701335621. The next prime is 66701335661. The reversal of 66701335645 is 54653310766.

It is not a de Polignac number, because 66701335645 - 2¹³ = 66701327453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66701335595 and 66701335604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23239449 + ... + 23242318.

It is an arithmetic number, because the mean of its divisors is an integer number (5856702768).

Almost surely, 2^66701335645 is an apocalyptic number.

It is an amenable number.

66701335645 is a deficient number, since it is larger than the sum of its proper divisors (27005908643).

66701335645 is a wasteful number, since it uses less digits than its factorization.

66701335645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46481820.

The product of its (nonzero) digits is 1360800, while the sum is 46.

The spelling of 66701335645 in words is "sixty-six billion, seven hundred one million, three hundred thirty-five thousand, six hundred forty-five".