66817068 has 24 divisors (see below), whose sum is σ = 156280320. Its totient is φ = 22218960.

The previous prime is 66817067. The next prime is 66817111. The reversal of 66817068 is 86071866.

It is a super-2 number, since 2×66817068² = 8929041152233248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66817061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1288 + ... + 11631.

It is an arithmetic number, because the mean of its divisors is an integer number (6511680).

Almost surely, 2^66817068 is an apocalyptic number.

It is an amenable number.

66817068 is an abundant number, since it is smaller than the sum of its proper divisors (89463252).

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

66817068 is a wasteful number, since it uses less digits than its factorization.

66817068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13357 (or 13355 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 66817068 is about 8174.1707836330. The cubic root of 66817068 is about 405.7848277837.

The spelling of 66817068 in words is "sixty-six million, eight hundred seventeen thousand, sixty-eight".