66885434 has 32 divisors (see below), whose sum is σ = 131673600. Its totient is φ = 24686640.

The previous prime is 66885407. The next prime is 66885437. The reversal of 66885434 is 43458866.

It is a super-2 number, since 2×66885434² = 8947322562736712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66885437) 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 15 ways as a sum of consecutive naturals, for example, 8504 + ... + 14355.

It is an arithmetic number, because the mean of its divisors is an integer number (4114800).

Almost surely, 2^66885434 is an apocalyptic number.

66885434 is a deficient number, since it is larger than the sum of its proper divisors (64788166).

66885434 is a wasteful number, since it uses less digits than its factorization.

66885434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22898.

The product of its digits is 552960, while the sum is 44.

The square root of 66885434 is about 8178.3515453910. The cubic root of 66885434 is about 405.9231778096.

The spelling of 66885434 in words is "sixty-six million, eight hundred eighty-five thousand, four hundred thirty-four".