65998994 has 8 divisors (see below), whose sum is σ = 100019388. Its totient is φ = 32659200.

The previous prime is 65998963. The next prime is 65998997. The reversal of 65998994 is 49989956.

65998994 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 62805625 + 3193369 = 7925^2 + 1787^2 .

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 (65998997) 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, 169907 + ... + 170294.

Almost surely, 2^65998994 is an apocalyptic number.

65998994 is a deficient number, since it is larger than the sum of its proper divisors (34020394).

65998994 is a wasteful number, since it uses less digits than its factorization.

65998994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340300.

The product of its digits is 6298560, while the sum is 59.

The square root of 65998994 is about 8123.9764893801. The cubic root of 65998994 is about 404.1219487753.

The spelling of 65998994 in words is "sixty-five million, nine hundred ninety-eight thousand, nine hundred ninety-four".