67164971 has 4 divisors (see below), whose sum is σ = 67256112. Its totient is φ = 67073832.

The previous prime is 67164949. The next prime is 67164989. The reversal of 67164971 is 17946176.

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 67164971 - 2¹⁸ = 66902827 is a prime.

It is a super-2 number, since 2×67164971² = 9022266658861682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67164371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44456 + ... + 45941.

It is an arithmetic number, because the mean of its divisors is an integer number (16814028).

Almost surely, 2^67164971 is an apocalyptic number.

67164971 is a deficient number, since it is larger than the sum of its proper divisors (91141).

67164971 is an equidigital number, since it uses as much as digits as its factorization.

67164971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91140.

The product of its digits is 63504, while the sum is 41.

The square root of 67164971 is about 8195.4237840395. The cubic root of 67164971 is about 406.4878888846.

The spelling of 67164971 in words is "sixty-seven million, one hundred sixty-four thousand, nine hundred seventy-one".