66673895 has 8 divisors (see below), whose sum is σ = 83487456. Its totient is φ = 51019936.

The previous prime is 66673879. The next prime is 66673903. The reversal of 66673895 is 59837666.

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

It is a cyclic number.

It is not a de Polignac number, because 66673895 - 2⁴ = 66673879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 289772 + ... + 290001.

It is an arithmetic number, because the mean of its divisors is an integer number (10435932).

Almost surely, 2^66673895 is an apocalyptic number.

66673895 is a deficient number, since it is larger than the sum of its proper divisors (16813561).

66673895 is a wasteful number, since it uses less digits than its factorization.

66673895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579801.

The product of its digits is 1632960, while the sum is 50.

The square root of 66673895 is about 8165.4084404884. The cubic root of 66673895 is about 405.4947872364.

The spelling of 66673895 in words is "sixty-six million, six hundred seventy-three thousand, eight hundred ninety-five".