67780441 has 4 divisors (see below), whose sum is σ = 67962532. Its totient is φ = 67598352.

The previous prime is 67780423. The next prime is 67780469. The reversal of 67780441 is 14408776.

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 20115225 + 47665216 = 4485^2 + 6904^2 .

It is a cyclic number.

It is not a de Polignac number, because 67780441 - 2⁷ = 67780313 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 67780441.

It is not an unprimeable number, because it can be changed into a prime (61780441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90486 + ... + 91231.

It is an arithmetic number, because the mean of its divisors is an integer number (16990633).

Almost surely, 2^67780441 is an apocalyptic number.

It is an amenable number.

67780441 is a deficient number, since it is larger than the sum of its proper divisors (182091).

67780441 is a wasteful number, since it uses less digits than its factorization.

67780441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182090.

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 67780441 is about 8232.8877679706. The cubic root of 67780441 is about 407.7257404071.

It can be divided in two parts, 677 and 80441, that added together give a palindrome (81118).

The spelling of 67780441 in words is "sixty-seven million, seven hundred eighty thousand, four hundred forty-one".