66385734 has 24 divisors (see below), whose sum is σ = 140131800. Its totient is φ = 20963232.

The previous prime is 66385721. The next prime is 66385763. The reversal of 66385734 is 43758366.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13159 + ... + 17490.

It is an arithmetic number, because the mean of its divisors is an integer number (5838825).

Almost surely, 2^66385734 is an apocalyptic number.

66385734 is an abundant number, since it is smaller than the sum of its proper divisors (73746066).

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

66385734 is a wasteful number, since it uses less digits than its factorization.

66385734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30692 (or 30673 counting only the distinct ones).

The product of its digits is 362880, while the sum is 42.

The square root of 66385734 is about 8147.7441049655. The cubic root of 66385734 is about 404.9097680403.

The spelling of 66385734 in words is "sixty-six million, three hundred eighty-five thousand, seven hundred thirty-four".