66393834 has 16 divisors (see below), whose sum is σ = 143002272. Its totient is φ = 20428848.

The previous prime is 66393829. The next prime is 66393839. The reversal of 66393834 is 43839366.

It is an interprime number because it is at equal distance from previous prime (66393829) and next prime (66393839).

It is not an unprimeable number, because it can be changed into a prime (66393839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 425524 + ... + 425679.

It is an arithmetic number, because the mean of its divisors is an integer number (8937642).

Almost surely, 2^66393834 is an apocalyptic number.

66393834 is an abundant number, since it is smaller than the sum of its proper divisors (76608438).

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

66393834 is a wasteful number, since it uses less digits than its factorization.

66393834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851221.

The product of its digits is 279936, while the sum is 42.

The square root of 66393834 is about 8148.2411599068. The cubic root of 66393834 is about 404.9262356132.

The spelling of 66393834 in words is "sixty-six million, three hundred ninety-three thousand, eight hundred thirty-four".