67921161 has 32 divisors (see below), whose sum is σ = 116812800. Its totient is φ = 34063680.

The previous prime is 67921127. The next prime is 67921169. The reversal of 67921161 is 16112976.

It is not a de Polignac number, because 67921161 - 2⁶ = 67921097 is a prime.

It is a super-2 number, since 2×67921161² = 9226568223175842, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (67921169) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1630 + ... + 11768.

It is an arithmetic number, because the mean of its divisors is an integer number (3650400).

Almost surely, 2^67921161 is an apocalyptic number.

It is an amenable number.

67921161 is a deficient number, since it is larger than the sum of its proper divisors (48891639).

67921161 is a wasteful number, since it uses less digits than its factorization.

67921161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10189.

The product of its digits is 4536, while the sum is 33.

The square root of 67921161 is about 8241.4295483247. The cubic root of 67921161 is about 408.0077072266.

The spelling of 67921161 in words is "sixty-seven million, nine hundred twenty-one thousand, one hundred sixty-one".