66360577672 has 8 divisors (see below), whose sum is σ = 124426083150. Its totient is φ = 33180288832.

The previous prime is 66360577669. The next prime is 66360577691. The reversal of 66360577672 is 27677506366.

It is a happy number.

66360577672 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 57775813956 + 8584763716 = 240366^2 + 92654^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4147536097 + ... + 4147536112.

Almost surely, 2^66360577672 is an apocalyptic number.

It is an amenable number.

66360577672 is a deficient number, since it is larger than the sum of its proper divisors (58065505478).

66360577672 is a wasteful number, since it uses less digits than its factorization.

66360577672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8295072215 (or 8295072211 counting only the distinct ones).

The product of its (nonzero) digits is 13335840, while the sum is 55.

The spelling of 66360577672 in words is "sixty-six billion, three hundred sixty million, five hundred seventy-seven thousand, six hundred seventy-two".