78561466 has 8 divisors (see below), whose sum is σ = 124044480. Its totient is φ = 37213308.

The previous prime is 78561463. The next prime is 78561481. The reversal of 78561466 is 66416587.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (78561463) 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, 1033666 + ... + 1033741.

It is an arithmetic number, because the mean of its divisors is an integer number (15505560).

Almost surely, 2^78561466 is an apocalyptic number.

78561466 is a deficient number, since it is larger than the sum of its proper divisors (45483014).

78561466 is a wasteful number, since it uses less digits than its factorization.

78561466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2067428.

The product of its digits is 241920, while the sum is 43.

The square root of 78561466 is about 8863.4906216456. The cubic root of 78561466 is about 428.2886114929.

The spelling of 78561466 in words is "seventy-eight million, five hundred sixty-one thousand, four hundred sixty-six".