66047212672 has 256 divisors, whose sum is σ = 163706572800. Its totient is φ = 25914470400.

The previous prime is 66047212661. The next prime is 66047212723. The reversal of 66047212672 is 27621274066.

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, 64060797 + ... + 64061827.

It is an arithmetic number, because the mean of its divisors is an integer number (639478800).

Almost surely, 2^66047212672 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 66047212672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81853286400).

66047212672 is an abundant number, since it is smaller than the sum of its proper divisors (97659360128).

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

66047212672 is a wasteful number, since it uses less digits than its factorization.

66047212672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1195 (or 1183 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 43.

The spelling of 66047212672 in words is "sixty-six billion, forty-seven million, two hundred twelve thousand, six hundred seventy-two".