65868994 has 8 divisors (see below), whose sum is σ = 98865468. Its totient is φ = 32913840.

The previous prime is 65868923. The next prime is 65868997. The reversal of 65868994 is 49986856.

65868994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 62995969 + 2873025 = 7937^2 + 1695^2 .

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

It is not an unprimeable number, because it can be changed into a prime (65868997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5977 + ... + 12940.

Almost surely, 2^65868994 is an apocalyptic number.

65868994 is a deficient number, since it is larger than the sum of its proper divisors (32996474).

65868994 is a wasteful number, since it uses less digits than its factorization.

65868994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20660.

The product of its digits is 3732480, while the sum is 55.

The square root of 65868994 is about 8115.9715376534. The cubic root of 65868994 is about 403.8564377338.

The spelling of 65868994 in words is "sixty-five million, eight hundred sixty-eight thousand, nine hundred ninety-four".