66687041 has 8 divisors (see below), whose sum is σ = 67541760. Its totient is φ = 65836512.

The previous prime is 66687011. The next prime is 66687053. The reversal of 66687041 is 14078666.

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 66687041 - 2¹⁴ = 66670657 is a prime.

It is a super-2 number, since 2×66687041² = 8894322874671362, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66686986 and 66687004.

It is not an unprimeable number, because it can be changed into a prime (66687011) 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, 41336 + ... + 42918.

It is an arithmetic number, because the mean of its divisors is an integer number (8442720).

Almost surely, 2^66687041 is an apocalyptic number.

It is an amenable number.

66687041 is a deficient number, since it is larger than the sum of its proper divisors (854719).

66687041 is a wasteful number, since it uses less digits than its factorization.

66687041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2095.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 66687041 is about 8166.2133819782. The cubic root of 66687041 is about 405.5214357679.

The spelling of 66687041 in words is "sixty-six million, six hundred eighty-seven thousand, forty-one".