66683707 has 8 divisors (see below), whose sum is σ = 70726176. Its totient is φ = 62654592.

The previous prime is 66683689. The next prime is 66683713. The reversal of 66683707 is 70738666.

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 66683707 - 2⁷ = 66683579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66683737) 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, 8098 + ... + 14104.

It is an arithmetic number, because the mean of its divisors is an integer number (8840772).

Almost surely, 2^66683707 is an apocalyptic number.

66683707 is a deficient number, since it is larger than the sum of its proper divisors (4042469).

66683707 is a wasteful number, since it uses less digits than its factorization.

66683707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6677.

The product of its (nonzero) digits is 254016, while the sum is 43.

The square root of 66683707 is about 8166.0092456475. The cubic root of 66683707 is about 405.5146776783.

The spelling of 66683707 in words is "sixty-six million, six hundred eighty-three thousand, seven hundred seven".