66128179716 has 27 divisors (see below), whose sum is σ = 167161243431. Its totient is φ = 22042212264.

The previous prime is 66128179703. The next prime is 66128179717. The reversal of 66128179716 is 61797182166.

The square root of 66128179716 is 257154.

It is a perfect power (a square), and thus also a powerful number.

66128179716 is a `hidden beast` number, since 6 + 612 + 8 + 1 + 7 + 9 + 7 + 16 = 666.

66128179716 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (66128179717) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1521495 + ... + 1564353.

Almost surely, 2^66128179716 is an apocalyptic number.

66128179716 is the 257154-th square number.

It is an amenable number.

66128179716 is an abundant number, since it is smaller than the sum of its proper divisors (101033063715).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66128179716 is an frugal number, since it uses more digits than its factorization.

66128179716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85728 (or 42864 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 54.

The spelling of 66128179716 in words is "sixty-six billion, one hundred twenty-eight million, one hundred seventy-nine thousand, seven hundred sixteen".