78286066 has 8 divisors (see below), whose sum is σ = 122534784. Its totient is φ = 37441140.

The previous prime is 78286063. The next prime is 78286069. The reversal of 78286066 is 66068287.

It is an interprime number because it is at equal distance from previous prime (78286063) and next prime (78286069).

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

It is a super-2 number, since 2×78286066² = 12257416259512712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78286063) 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, 850890 + ... + 850981.

It is an arithmetic number, because the mean of its divisors is an integer number (15316848).

Almost surely, 2^78286066 is an apocalyptic number.

78286066 is a deficient number, since it is larger than the sum of its proper divisors (44248718).

78286066 is a wasteful number, since it uses less digits than its factorization.

78286066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1701896.

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 78286066 is about 8847.9413424819. The cubic root of 78286066 is about 427.7875652615.

The spelling of 78286066 in words is "seventy-eight million, two hundred eighty-six thousand, sixty-six".