66514217 has 48 divisors (see below), whose sum is σ = 91363200. Its totient is φ = 47980800.

The previous prime is 66514213. The next prime is 66514237. The reversal of 66514217 is 71241566.

It is not a de Polignac number, because 66514217 - 2² = 66514213 is a prime.

It is a Duffinian number.

Its product of digits (10080) is a multiple of the sum of its prime divisors (96).

It is not an unprimeable number, because it can be changed into a prime (66514213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1090367 + ... + 1090427.

It is an arithmetic number, because the mean of its divisors is an integer number (1903400).

Almost surely, 2^66514217 is an apocalyptic number.

It is an amenable number.

66514217 is a deficient number, since it is larger than the sum of its proper divisors (24848983).

66514217 is a wasteful number, since it uses less digits than its factorization.

66514217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127 (or 96 counting only the distinct ones).

The product of its digits is 10080, while the sum is 32.

The square root of 66514217 is about 8155.6248687639. The cubic root of 66514217 is about 405.1708205898.

The spelling of 66514217 in words is "sixty-six million, five hundred fourteen thousand, two hundred seventeen".