66673968 has 40 divisors (see below), whose sum is σ = 172780608. Its totient is φ = 22155072.

The previous prime is 66673967. The next prime is 66673979. The reversal of 66673968 is 86937666.

It is a self number, because there is not a number n which added to its sum of digits gives 66673968.

It is not an unprimeable number, because it can be changed into a prime (66673961) 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, 14655 + ... + 18657.

Almost surely, 2^66673968 is an apocalyptic number.

It is an amenable number.

66673968 is an abundant number, since it is smaller than the sum of its proper divisors (106106640).

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

66673968 is a wasteful number, since it uses less digits than its factorization.

66673968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4361 (or 4355 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 51.

The square root of 66673968 is about 8165.4129105637. The cubic root of 66673968 is about 405.4949352259.

The spelling of 66673968 in words is "sixty-six million, six hundred seventy-three thousand, nine hundred sixty-eight".