67061291 has 4 divisors (see below), whose sum is σ = 73157784. Its totient is φ = 60964800.

The previous prime is 67061263. The next prime is 67061299. The reversal of 67061291 is 19216076.

It is a happy number.

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 67061291 - 2⁶ = 67061227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67061299) 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, 3048230 + ... + 3048251.

It is an arithmetic number, because the mean of its divisors is an integer number (18289446).

Almost surely, 2^67061291 is an apocalyptic number.

67061291 is a deficient number, since it is larger than the sum of its proper divisors (6096493).

67061291 is a wasteful number, since it uses less digits than its factorization.

67061291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6096492.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 67061291 is about 8189.0958597393. The cubic root of 67061291 is about 406.2786212261.

It can be divided in two parts, 6706 and 1291, that added together give a palindrome (7997).

The spelling of 67061291 in words is "sixty-seven million, sixty-one thousand, two hundred ninety-one".