65993958 has 12 divisors (see below), whose sum is σ = 142986948. Its totient is φ = 21997980.

The previous prime is 65993927. The next prime is 65993959. The reversal of 65993958 is 85939956.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65993959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1833148 + ... + 1833183.

It is an arithmetic number, because the mean of its divisors is an integer number (11915579).

Almost surely, 2^65993958 is an apocalyptic number.

65993958 is an abundant number, since it is smaller than the sum of its proper divisors (76992990).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65993958 is a wasteful number, since it uses less digits than its factorization.

65993958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3666339 (or 3666336 counting only the distinct ones).

The product of its digits is 2624400, while the sum is 54.

The square root of 65993958 is about 8123.6665367308. Note that the first 3 decimals coincide. The cubic root of 65993958 is about 404.1116697807. Note that the first 3 decimals are identical.

The spelling of 65993958 in words is "sixty-five million, nine hundred ninety-three thousand, nine hundred fifty-eight".