66020968 has 16 divisors (see below), whose sum is σ = 133311780. Its totient is φ = 30471168.

The previous prime is 66020963. The next prime is 66020989. The reversal of 66020968 is 86902066.

It can be written as a sum of positive squares in 2 ways, for example, as 65318724 + 702244 = 8082^2 + 838^2 .

It is not an unprimeable number, because it can be changed into a prime (66020963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 317305 + ... + 317512.

Almost surely, 2^66020968 is an apocalyptic number.

It is an amenable number.

66020968 is an abundant number, since it is smaller than the sum of its proper divisors (67290812).

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

66020968 is a wasteful number, since it uses less digits than its factorization.

66020968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634836 (or 634832 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 66020968 is about 8125.3287933474. The cubic root of 66020968 is about 404.1667938545.

The spelling of 66020968 in words is "sixty-six million, twenty thousand, nine hundred sixty-eight".