65666349 has 32 divisors (see below), whose sum is σ = 111939840. Its totient is φ = 37267776.

The previous prime is 65666323. The next prime is 65666371. The reversal of 65666349 is 94366656.

It is not a de Polignac number, because 65666349 - 2⁸ = 65666093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65666309) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28567 + ... + 30779.

It is an arithmetic number, because the mean of its divisors is an integer number (3498120).

Almost surely, 2^65666349 is an apocalyptic number.

It is an amenable number.

65666349 is a deficient number, since it is larger than the sum of its proper divisors (46273491).

65666349 is a wasteful number, since it uses less digits than its factorization.

65666349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2386 (or 2380 counting only the distinct ones).

The product of its digits is 699840, while the sum is 45.

The square root of 65666349 is about 8103.4775868142. The cubic root of 65666349 is about 403.4418594799.

The spelling of 65666349 in words is "sixty-five million, six hundred sixty-six thousand, three hundred forty-nine".