66705575153 has 16 divisors (see below), whose sum is σ = 77416611840. Its totient is φ = 56292205200.

The previous prime is 66705575149. The next prime is 66705575161. The reversal of 66705575153 is 35157550766.

It is a happy number.

It is not a de Polignac number, because 66705575153 - 2² = 66705575149 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66705575173) 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, 264008 + ... + 450678.

It is an arithmetic number, because the mean of its divisors is an integer number (4838538240).

Almost surely, 2^66705575153 is an apocalyptic number.

It is an amenable number.

66705575153 is a deficient number, since it is larger than the sum of its proper divisors (10711036687).

66705575153 is a wasteful number, since it uses less digits than its factorization.

66705575153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187468.

The product of its (nonzero) digits is 3307500, while the sum is 50.

The spelling of 66705575153 in words is "sixty-six billion, seven hundred five million, five hundred seventy-five thousand, one hundred fifty-three".