67160521 has 4 divisors (see below), whose sum is σ = 67689472. Its totient is φ = 66631572.

The previous prime is 67160473. The next prime is 67160531. The reversal of 67160521 is 12506176.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 67160521 - 2¹⁷ = 67029449 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 67160521.

It is not an unprimeable number, because it can be changed into a prime (67160531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264285 + ... + 264538.

It is an arithmetic number, because the mean of its divisors is an integer number (16922368).

Almost surely, 2^67160521 is an apocalyptic number.

It is an amenable number.

67160521 is a deficient number, since it is larger than the sum of its proper divisors (528951).

67160521 is a wasteful number, since it uses less digits than its factorization.

67160521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528950.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 67160521 is about 8195.1522865655. The cubic root of 67160521 is about 406.4789114319.

Adding to 67160521 its reverse (12506176), we get a palindrome (79666697).

The spelling of 67160521 in words is "sixty-seven million, one hundred sixty thousand, five hundred twenty-one".