67646745 has 80 divisors (see below), whose sum is σ = 130680000. Its totient is φ = 33374592.

The previous prime is 67646737. The next prime is 67646779. The reversal of 67646745 is 54764676.

It is a happy number.

It is not a de Polignac number, because 67646745 - 2³ = 67646737 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 67646745.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 453931 + ... + 454079.

It is an arithmetic number, because the mean of its divisors is an integer number (1633500).

Almost surely, 2^67646745 is an apocalyptic number.

It is an amenable number.

67646745 is a deficient number, since it is larger than the sum of its proper divisors (63033255).

67646745 is a wasteful number, since it uses less digits than its factorization.

67646745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244 (or 235 counting only the distinct ones).

The product of its digits is 846720, while the sum is 45.

The square root of 67646745 is about 8224.7641303566. The cubic root of 67646745 is about 407.4574861239.

The spelling of 67646745 in words is "sixty-seven million, six hundred forty-six thousand, seven hundred forty-five".