66887117 has 8 divisors (see below), whose sum is σ = 73046880. Its totient is φ = 60740560.

The previous prime is 66887101. The next prime is 66887123. The reversal of 66887117 is 71178866.

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 66887117 - 2⁴ = 66887101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66887147) 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, 9458 + ... + 14940.

It is an arithmetic number, because the mean of its divisors is an integer number (9130860).

Almost surely, 2^66887117 is an apocalyptic number.

It is an amenable number.

66887117 is a deficient number, since it is larger than the sum of its proper divisors (6159763).

66887117 is a wasteful number, since it uses less digits than its factorization.

66887117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6603.

The product of its digits is 112896, while the sum is 44.

The square root of 66887117 is about 8178.4544383398. The cubic root of 66887117 is about 405.9265824521.

The spelling of 66887117 in words is "sixty-six million, eight hundred eighty-seven thousand, one hundred seventeen".