78166214 has 16 divisors (see below), whose sum is σ = 135057408. Its totient is φ = 33235272.

The previous prime is 78166211. The next prime is 78166267. The reversal of 78166214 is 41266187.

It is a super-2 number, since 2×78166214² = 12219914022187592, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78166211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20204 + ... + 23759.

It is an arithmetic number, because the mean of its divisors is an integer number (8441088).

Almost surely, 2^78166214 is an apocalyptic number.

78166214 is a deficient number, since it is larger than the sum of its proper divisors (56891194).

78166214 is a wasteful number, since it uses less digits than its factorization.

78166214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44099.

The product of its digits is 16128, while the sum is 35.

The square root of 78166214 is about 8841.1658733450. The cubic root of 78166214 is about 427.5691467327.

The spelling of 78166214 in words is "seventy-eight million, one hundred sixty-six thousand, two hundred fourteen".