67616663 has 4 divisors (see below), whose sum is σ = 68313840. Its totient is φ = 66919488.

The previous prime is 67616651. The next prime is 67616671. The reversal of 67616663 is 36661676.

It is a happy number.

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 67616663 - 2⁸ = 67616407 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 67616663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67616623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348443 + ... + 348636.

It is an arithmetic number, because the mean of its divisors is an integer number (17078460).

Almost surely, 2^67616663 is an apocalyptic number.

67616663 is a deficient number, since it is larger than the sum of its proper divisors (697177).

67616663 is an equidigital number, since it uses as much as digits as its factorization.

67616663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697176.

The product of its digits is 163296, while the sum is 41.

The square root of 67616663 is about 8222.9351815517. The cubic root of 67616663 is about 407.3970794065.

The spelling of 67616663 in words is "sixty-seven million, six hundred sixteen thousand, six hundred sixty-three".