66570656073 has 16 divisors (see below), whose sum is σ = 92630200320. Its totient is φ = 42446197904.

The previous prime is 66570656071. The next prime is 66570656101. The reversal of 66570656073 is 37065607566.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 66570656073 - 2¹ = 66570656071 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (66570656071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 647590 + ... + 743312.

It is an arithmetic number, because the mean of its divisors is an integer number (5789387520).

Almost surely, 2^66570656073 is an apocalyptic number.

It is an amenable number.

66570656073 is a deficient number, since it is larger than the sum of its proper divisors (26059544247).

66570656073 is a wasteful number, since it uses less digits than its factorization.

66570656073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105828.

The product of its (nonzero) digits is 4762800, while the sum is 51.

The spelling of 66570656073 in words is "sixty-six billion, five hundred seventy million, six hundred fifty-six thousand, seventy-three".