67782665 has 4 divisors (see below), whose sum is σ = 81339204. Its totient is φ = 54226128.

The previous prime is 67782661. The next prime is 67782677. The reversal of 67782665 is 56628776.

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 45010681 + 22771984 = 6709^2 + 4772^2 .

It is a cyclic number.

It is not a de Polignac number, because 67782665 - 2² = 67782661 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67782661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6778262 + ... + 6778271.

It is an arithmetic number, because the mean of its divisors is an integer number (20334801).

Almost surely, 2^67782665 is an apocalyptic number.

It is an amenable number.

67782665 is a deficient number, since it is larger than the sum of its proper divisors (13556539).

67782665 is a wasteful number, since it uses less digits than its factorization.

67782665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13556538.

The product of its digits is 846720, while the sum is 47.

The square root of 67782665 is about 8233.0228349009. The cubic root of 67782665 is about 407.7301997670.

The spelling of 67782665 in words is "sixty-seven million, seven hundred eighty-two thousand, six hundred sixty-five".