67471663 has 4 divisors (see below), whose sum is σ = 77110480. Its totient is φ = 57832848.

The previous prime is 67471643. The next prime is 67471667. The reversal of 67471663 is 36617476.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67471663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67471667) 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, 4819398 + ... + 4819411.

It is an arithmetic number, because the mean of its divisors is an integer number (19277620).

Almost surely, 2^67471663 is an apocalyptic number.

67471663 is a deficient number, since it is larger than the sum of its proper divisors (9638817).

67471663 is an equidigital number, since it uses as much as digits as its factorization.

67471663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9638816.

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

The square root of 67471663 is about 8214.1136466450. The cubic root of 67471663 is about 407.1056578832.

The spelling of 67471663 in words is "sixty-seven million, four hundred seventy-one thousand, six hundred sixty-three".