67664489 has 4 divisors (see below), whose sum is σ = 67733760. Its totient is φ = 67595220.

The previous prime is 67664479. The next prime is 67664501. The reversal of 67664489 is 98446676.

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 a de Polignac number, because none of the positive numbers 2^k-67664489 is a prime.

It is a super-2 number, since 2×67664489² = 9156966143262242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67664419) 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, 33149 + ... + 35130.

It is an arithmetic number, because the mean of its divisors is an integer number (16933440).

Almost surely, 2^67664489 is an apocalyptic number.

It is an amenable number.

67664489 is a deficient number, since it is larger than the sum of its proper divisors (69271).

67664489 is an equidigital number, since it uses as much as digits as its factorization.

67664489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69270.

The product of its digits is 1741824, while the sum is 50.

The square root of 67664489 is about 8225.8427531773. The cubic root of 67664489 is about 407.4931088952.

The spelling of 67664489 in words is "sixty-seven million, six hundred sixty-four thousand, four hundred eighty-nine".