66703668 has 24 divisors (see below), whose sum is σ = 155856960. Its totient is φ = 22203840.

The previous prime is 66703667. The next prime is 66703691. The reversal of 66703668 is 86630766.

It is a super-3 number, since 3×66703668³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66703667) 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, 6273 + ... + 13143.

It is an arithmetic number, because the mean of its divisors is an integer number (6494040).

Almost surely, 2^66703668 is an apocalyptic number.

It is an amenable number.

66703668 is an abundant number, since it is smaller than the sum of its proper divisors (89153292).

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

66703668 is a wasteful number, since it uses less digits than its factorization.

66703668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7687 (or 7685 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 42.

The square root of 66703668 is about 8167.2313546269. The cubic root of 66703668 is about 405.5551356918. Note that the first 3 decimals are identical.

The spelling of 66703668 in words is "sixty-six million, seven hundred three thousand, six hundred sixty-eight".