78166448 has 20 divisors (see below), whose sum is σ = 152222400. Its totient is φ = 38883264.

The previous prime is 78166441. The next prime is 78166453. The reversal of 78166448 is 84466187.

78166448 is nontrivially palindromic in base 14.

It is a super-2 number, since 2×78166448² = 12219987185873408, which contains 22 as substring.

Together with 74055952 it forms an amicable pair .

It is a junction number, because it is equal to n+sod(n) for n = 78166399 and 78166408.

It is not an unprimeable number, because it can be changed into a prime (78166441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9248 + ... + 15551.

It is an arithmetic number, because the mean of its divisors is an integer number (7611120).

Almost surely, 2^78166448 is an apocalyptic number.

It is an amenable number.

78166448 is a deficient number, since it is larger than the sum of its proper divisors (74055952).

78166448 is a wasteful number, since it uses less digits than its factorization.

78166448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25004 (or 24998 counting only the distinct ones).

The product of its digits is 258048, while the sum is 44.

The square root of 78166448 is about 8841.1791068839. The cubic root of 78166448 is about 427.5695733922.

The spelling of 78166448 in words is "seventy-eight million, one hundred sixty-six thousand, four hundred forty-eight".