66034348821 has 64 divisors (see below), whose sum is σ = 113527664640. Its totient is φ = 37153650240.

The previous prime is 66034348813. The next prime is 66034348843. The reversal of 66034348821 is 12884343066.

66034348821 is a `hidden beast` number, since 6 + 603 + 4 + 34 + 8 + 8 + 2 + 1 = 666.

It is not a de Polignac number, because 66034348821 - 2³ = 66034348813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66034348811) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11846191 + ... + 11851763.

It is an arithmetic number, because the mean of its divisors is an integer number (1773869760).

Almost surely, 2^66034348821 is an apocalyptic number.

It is an amenable number.

66034348821 is a deficient number, since it is larger than the sum of its proper divisors (47493315819).

66034348821 is a wasteful number, since it uses less digits than its factorization.

66034348821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6543 (or 6537 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 45.

The spelling of 66034348821 in words is "sixty-six billion, thirty-four million, three hundred forty-eight thousand, eight hundred twenty-one".