66440035 has 4 divisors (see below), whose sum is σ = 79728048. Its totient is φ = 53152024.

The previous prime is 66440021. The next prime is 66440071. The reversal of 66440035 is 53004466.

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 66440035 - 2¹⁹ = 65915747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66439985 and 66440012.

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 3 ways as a sum of consecutive naturals, for example, 6643999 + ... + 6644008.

It is an arithmetic number, because the mean of its divisors is an integer number (19932012).

Almost surely, 2^66440035 is an apocalyptic number.

66440035 is a deficient number, since it is larger than the sum of its proper divisors (13288013).

66440035 is a wasteful number, since it uses less digits than its factorization.

66440035 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13288012.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 66440035 is about 8151.0756958821. The cubic root of 66440035 is about 405.0201382051.

The spelling of 66440035 in words is "sixty-six million, four hundred forty thousand, thirty-five".