65951983 has 8 divisors (see below), whose sum is σ = 69776000. Its totient is φ = 62163288.

The previous prime is 65951969. The next prime is 65951987. The reversal of 65951983 is 38915956.

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

It is not a de Polignac number, because 65951983 - 2²⁵ = 32397551 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 (65951987) 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, 4941 + ... + 12502.

It is an arithmetic number, because the mean of its divisors is an integer number (8722000).

Almost surely, 2^65951983 is an apocalyptic number.

65951983 is a deficient number, since it is larger than the sum of its proper divisors (3824017).

65951983 is a wasteful number, since it uses less digits than its factorization.

65951983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17661.

The product of its digits is 291600, while the sum is 46.

The square root of 65951983 is about 8121.0826248721. The cubic root of 65951983 is about 404.0259741331.

The spelling of 65951983 in words is "sixty-five million, nine hundred fifty-one thousand, nine hundred eighty-three".