66698068 has 24 divisors (see below), whose sum is σ = 122234112. Its totient is φ = 31784544.

The previous prime is 66698017. The next prime is 66698069. The reversal of 66698068 is 86089666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66698069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28021 + ... + 30307.

It is an arithmetic number, because the mean of its divisors is an integer number (5093088).

Almost surely, 2^66698068 is an apocalyptic number.

It is an amenable number.

66698068 is a deficient number, since it is larger than the sum of its proper divisors (55536044).

66698068 is a wasteful number, since it uses less digits than its factorization.

66698068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2631 (or 2629 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 49.

The square root of 66698068 is about 8166.8885139936. Note that the first 3 decimals coincide. The cubic root of 66698068 is about 405.5437861294.

The spelling of 66698068 in words is "sixty-six million, six hundred ninety-eight thousand, sixty-eight".