67645434 has 16 divisors (see below), whose sum is σ = 142411680. Its totient is φ = 21361680.

The previous prime is 67645423. The next prime is 67645439. The reversal of 67645434 is 43454676.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 67645392 and 67645401.

It is not an unprimeable number, because it can be changed into a prime (67645439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 296577 + ... + 296804.

It is an arithmetic number, because the mean of its divisors is an integer number (8900730).

Almost surely, 2^67645434 is an apocalyptic number.

67645434 is an abundant number, since it is smaller than the sum of its proper divisors (74766246).

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

67645434 is a wasteful number, since it uses less digits than its factorization.

67645434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593405.

The product of its digits is 241920, while the sum is 39.

The square root of 67645434 is about 8224.6844316363. The cubic root of 67645434 is about 407.4548539193.

The spelling of 67645434 in words is "sixty-seven million, six hundred forty-five thousand, four hundred thirty-four".