66883985 has 8 divisors (see below), whose sum is σ = 91726656. Its totient is φ = 45863280.

The previous prime is 66883979. The next prime is 66883991. The reversal of 66883985 is 58938866.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (66883979) and next prime (66883991).

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

It is not a de Polignac number, because 66883985 - 2¹² = 66879889 is a prime.

It is a Curzon 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, 955451 + ... + 955520.

It is an arithmetic number, because the mean of its divisors is an integer number (11465832).

Almost surely, 2^66883985 is an apocalyptic number.

It is an amenable number.

66883985 is a deficient number, since it is larger than the sum of its proper divisors (24842671).

66883985 is a wasteful number, since it uses less digits than its factorization.

66883985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1910983.

The product of its digits is 2488320, while the sum is 53.

The square root of 66883985 is about 8178.2629573767. The cubic root of 66883985 is about 405.9202464940.

The spelling of 66883985 in words is "sixty-six million, eight hundred eighty-three thousand, nine hundred eighty-five".