78266145 has 8 divisors (see below), whose sum is σ = 125225856. Its totient is φ = 41741936.

The previous prime is 78266143. The next prime is 78266159. The reversal of 78266145 is 54166287.

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

It is a cyclic number.

It is not a de Polignac number, because 78266145 - 2¹ = 78266143 is a prime.

It is a super-2 number, since 2×78266145² = 12251178906322050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78266143) 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 7 ways as a sum of consecutive naturals, for example, 2608857 + ... + 2608886.

It is an arithmetic number, because the mean of its divisors is an integer number (15653232).

Almost surely, 2^78266145 is an apocalyptic number.

It is an amenable number.

78266145 is a deficient number, since it is larger than the sum of its proper divisors (46959711).

78266145 is a wasteful number, since it uses less digits than its factorization.

78266145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5217751.

The product of its digits is 80640, while the sum is 39.

The square root of 78266145 is about 8846.8155287651. The cubic root of 78266145 is about 427.7512766452.

The spelling of 78266145 in words is "seventy-eight million, two hundred sixty-six thousand, one hundred forty-five".