66077995652928 has 336 divisors, whose sum is σ = 225919995525120. Its totient is φ = 18054512796672.

The previous prime is 66077995652917. The next prime is 66077995652953. The reversal of 66077995652928 is 82925659977066.

66077995652928 is a `hidden beast` number, since 6 + 6 + 0 + 7 + 7 + 9 + 9 + 565 + 29 + 28 = 666.

It is a tau number, because it is divible by the number of its divisors (336).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 423447303 + ... + 423603321.

Almost surely, 2^{66077995652928} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66077995652928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112959997762560).

66077995652928 is an abundant number, since it is smaller than the sum of its proper divisors (159841999872192).

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

66077995652928 is a wasteful number, since it uses less digits than its factorization.

66077995652928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160634 (or 160621 counting only the distinct ones).

The product of its (nonzero) digits is 6172588800, while the sum is 81.

The spelling of 66077995652928 in words is "sixty-six trillion, seventy-seven billion, nine hundred ninety-five million, six hundred fifty-two thousand, nine hundred twenty-eight".