65939671 has 8 divisors (see below), whose sum is σ = 79326080. Its totient is φ = 53544888.

The previous prime is 65939611. The next prime is 65939677. The reversal of 65939671 is 17693956.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 65939671 - 2¹³ = 65931479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65939677) 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, 247761 + ... + 248026.

It is an arithmetic number, because the mean of its divisors is an integer number (9915760).

Almost surely, 2^65939671 is an apocalyptic number.

65939671 is a deficient number, since it is larger than the sum of its proper divisors (13386409).

65939671 is a wasteful number, since it uses less digits than its factorization.

65939671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495813.

The product of its digits is 306180, while the sum is 46.

The square root of 65939671 is about 8120.3245624790. The cubic root of 65939671 is about 404.0008312076. Note that the first 3 decimals are identical.

The spelling of 65939671 in words is "sixty-five million, nine hundred thirty-nine thousand, six hundred seventy-one".