66435379 has 4 divisors (see below), whose sum is σ = 66680800. Its totient is φ = 66189960.

The previous prime is 66435367. The next prime is 66435389. The reversal of 66435379 is 97353466.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66435379 - 2⁷ = 66435251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66435359) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 122304 + ... + 122845.

It is an arithmetic number, because the mean of its divisors is an integer number (16670200).

Almost surely, 2^66435379 is an apocalyptic number.

66435379 is a deficient number, since it is larger than the sum of its proper divisors (245421).

66435379 is a wasteful number, since it uses less digits than its factorization.

66435379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245420.

The product of its digits is 408240, while the sum is 43.

The square root of 66435379 is about 8150.7900844029. The cubic root of 66435379 is about 405.0106769527.

The spelling of 66435379 in words is "sixty-six million, four hundred thirty-five thousand, three hundred seventy-nine".