67663471 has 4 divisors (see below), whose sum is σ = 67680712. Its totient is φ = 67646232.

The previous prime is 67663439. The next prime is 67663507. The reversal of 67663471 is 17436676.

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 67663471 - 2⁵ = 67663439 is a prime.

It is a super-3 number, since 3×67663471³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67660471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 445 + ... + 11641.

It is an arithmetic number, because the mean of its divisors is an integer number (16920178).

Almost surely, 2^67663471 is an apocalyptic number.

67663471 is a deficient number, since it is larger than the sum of its proper divisors (17241).

67663471 is a wasteful number, since it uses less digits than its factorization.

67663471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17240.

The product of its digits is 127008, while the sum is 40.

The square root of 67663471 is about 8225.7808747863. The cubic root of 67663471 is about 407.4910653316.

The spelling of 67663471 in words is "sixty-seven million, six hundred sixty-three thousand, four hundred seventy-one".