66913798 has 8 divisors (see below), whose sum is σ = 114709392. Its totient is φ = 28677336.

The previous prime is 66913789. The next prime is 66913823. The reversal of 66913798 is 89731966.

66913798 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

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, 2389765 + ... + 2389792.

It is an arithmetic number, because the mean of its divisors is an integer number (14338674).

Almost surely, 2^66913798 is an apocalyptic number.

66913798 is a deficient number, since it is larger than the sum of its proper divisors (47795594).

66913798 is a wasteful number, since it uses less digits than its factorization.

66913798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4779566.

The product of its digits is 489888, while the sum is 49.

The square root of 66913798 is about 8180.0854518764. The cubic root of 66913798 is about 405.9805494334.

The spelling of 66913798 in words is "sixty-six million, nine hundred thirteen thousand, seven hundred ninety-eight".