67788645 has 16 divisors (see below), whose sum is σ = 108681792. Its totient is φ = 36080640.

The previous prime is 67788641. The next prime is 67788653. The reversal of 67788645 is 54688776.

It is not a de Polignac number, because 67788645 - 2² = 67788641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67788641) 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 15 ways as a sum of consecutive naturals, for example, 3525 + ... + 12165.

It is an arithmetic number, because the mean of its divisors is an integer number (6792612).

Almost surely, 2^67788645 is an apocalyptic number.

It is an amenable number.

67788645 is a deficient number, since it is larger than the sum of its proper divisors (40893147).

67788645 is a wasteful number, since it uses less digits than its factorization.

67788645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9172.

The product of its digits is 2257920, while the sum is 51.

The square root of 67788645 is about 8233.3859984820. The cubic root of 67788645 is about 407.7421898281.

The spelling of 67788645 in words is "sixty-seven million, seven hundred eighty-eight thousand, six hundred forty-five".