66998374 has 8 divisors (see below), whose sum is σ = 102145248. Its totient is φ = 32949960.

The previous prime is 66998363. The next prime is 66998383. The reversal of 66998374 is 47389966.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 274462 + ... + 274705.

It is an arithmetic number, because the mean of its divisors is an integer number (12768156).

Almost surely, 2^66998374 is an apocalyptic number.

66998374 is a deficient number, since it is larger than the sum of its proper divisors (35146874).

66998374 is a wasteful number, since it uses less digits than its factorization.

66998374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549230.

The product of its digits is 1959552, while the sum is 52.

The square root of 66998374 is about 8185.2534475116. The cubic root of 66998374 is about 406.1515244074.

The spelling of 66998374 in words is "sixty-six million, nine hundred ninety-eight thousand, three hundred seventy-four".