67766645 has 8 divisors (see below), whose sum is σ = 83303640. Its totient is φ = 52890880.

The previous prime is 67766627. The next prime is 67766663. The reversal of 67766645 is 54666776.

It is an interprime number because it is at equal distance from previous prime (67766627) and next prime (67766663).

It can be written as a sum of positive squares in 4 ways, for example, as 7409284 + 60357361 = 2722^2 + 7769^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-67766645 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 67766645.

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, 165080 + ... + 165489.

It is an arithmetic number, because the mean of its divisors is an integer number (10412955).

Almost surely, 2^67766645 is an apocalyptic number.

It is an amenable number.

67766645 is a deficient number, since it is larger than the sum of its proper divisors (15536995).

67766645 is a wasteful number, since it uses less digits than its factorization.

67766645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330615.

The product of its digits is 1270080, while the sum is 47.

The square root of 67766645 is about 8232.0498662241. The cubic root of 67766645 is about 407.6980757598.

The spelling of 67766645 in words is "sixty-seven million, seven hundred sixty-six thousand, six hundred forty-five".