66195750136 has 32 divisors (see below), whose sum is σ = 127503249840. Its totient is φ = 32195328768.

The previous prime is 66195750109. The next prime is 66195750151. The reversal of 66195750136 is 63105759166.

It is a self number, because there is not a number n which added to its sum of digits gives 66195750136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1265820 + ... + 1317076.

Almost surely, 2^66195750136 is an apocalyptic number.

It is an amenable number.

66195750136 is a deficient number, since it is larger than the sum of its proper divisors (61307499704).

66195750136 is a wasteful number, since it uses less digits than its factorization.

66195750136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55663 (or 55659 counting only the distinct ones).

The product of its (nonzero) digits is 1020600, while the sum is 49.

The spelling of 66195750136 in words is "sixty-six billion, one hundred ninety-five million, seven hundred fifty thousand, one hundred thirty-six".