66914017 has 4 divisors (see below), whose sum is σ = 66978736. Its totient is φ = 66849300.

The previous prime is 66913997. The next prime is 66914051. The reversal of 66914017 is 71041966.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71041966 = 2 ⋅35520983.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66914017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66914077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30783 + ... + 32884.

It is an arithmetic number, because the mean of its divisors is an integer number (16744684).

Almost surely, 2^66914017 is an apocalyptic number.

It is an amenable number.

66914017 is a deficient number, since it is larger than the sum of its proper divisors (64719).

66914017 is a wasteful number, since it uses less digits than its factorization.

66914017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64718.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 66914017 is about 8180.0988380337. The cubic root of 66914017 is about 405.9809923398.

The spelling of 66914017 in words is "sixty-six million, nine hundred fourteen thousand, seventeen".