66576620227516 has 96 divisors (see below), whose sum is σ = 137255280906240. Its totient is φ = 27665395236864.

The previous prime is 66576620227487. The next prime is 66576620227549. The reversal of 66576620227516 is 61572202667566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 314114065 + ... + 314325943.

It is an arithmetic number, because the mean of its divisors is an integer number (1429742509440).

Almost surely, 2^{66576620227516} 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 66576620227516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68627640453120).

66576620227516 is an abundant number, since it is smaller than the sum of its proper divisors (70678660678724).

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

66576620227516 is a wasteful number, since it uses less digits than its factorization.

66576620227516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214163 (or 214161 counting only the distinct ones).

The product of its (nonzero) digits is 76204800, while the sum is 61.

The spelling of 66576620227516 in words is "sixty-six trillion, five hundred seventy-six billion, six hundred twenty million, two hundred twenty-seven thousand, five hundred sixteen".