67378765 has 4 divisors (see below), whose sum is σ = 80854524. Its totient is φ = 53903008.

The previous prime is 67378763. The next prime is 67378771. The reversal of 67378765 is 56787376.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46703556 + 20675209 = 6834^2 + 4547^2 .

It is a cyclic number.

It is not a de Polignac number, because 67378765 - 2¹ = 67378763 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67378763) 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, 6737872 + ... + 6737881.

It is an arithmetic number, because the mean of its divisors is an integer number (20213631).

Almost surely, 2^67378765 is an apocalyptic number.

It is an amenable number.

67378765 is a deficient number, since it is larger than the sum of its proper divisors (13475759).

67378765 is a wasteful number, since it uses less digits than its factorization.

67378765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13475758.

The product of its digits is 1481760, while the sum is 49.

The square root of 67378765 is about 8208.4569195434. The cubic root of 67378765 is about 406.9187316482.

The spelling of 67378765 in words is "sixty-seven million, three hundred seventy-eight thousand, seven hundred sixty-five".