78775066 has 8 divisors (see below), whose sum is σ = 120392244. Its totient is φ = 38644320.

The previous prime is 78775009. The next prime is 78775133. The reversal of 78775066 is 66057787.

It can be written as a sum of positive squares in 2 ways, for example, as 73462041 + 5313025 = 8571^2 + 2305^2 .

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

It is a super-2 number, since 2×78775066² = 12411022046608712, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 371475 + ... + 371686.

Almost surely, 2^78775066 is an apocalyptic number.

78775066 is a deficient number, since it is larger than the sum of its proper divisors (41617178).

78775066 is a wasteful number, since it uses less digits than its factorization.

78775066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743216.

The product of its (nonzero) digits is 493920, while the sum is 46.

The square root of 78775066 is about 8875.5318713866. The cubic root of 78775066 is about 428.6764168078.

The spelling of 78775066 in words is "seventy-eight million, seven hundred seventy-five thousand, sixty-six".