67646645 has 8 divisors (see below), whose sum is σ = 88555680. Its totient is φ = 49197520.

The previous prime is 67646639. The next prime is 67646687. The reversal of 67646645 is 54664676.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 67646645 - 2⁴ = 67646629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 67646596 and 67646605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 614915 + ... + 615024.

It is an arithmetic number, because the mean of its divisors is an integer number (11069460).

Almost surely, 2^67646645 is an apocalyptic number.

It is an amenable number.

67646645 is a deficient number, since it is larger than the sum of its proper divisors (20909035).

67646645 is a wasteful number, since it uses less digits than its factorization.

67646645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229955.

The product of its digits is 725760, while the sum is 44.

The square root of 67646645 is about 8224.7580511526. The cubic root of 67646645 is about 407.4572853467.

The spelling of 67646645 in words is "sixty-seven million, six hundred forty-six thousand, six hundred forty-five".