84878066 has 32 divisors (see below), whose sum is σ = 157223808. Its totient is φ = 33465600.

The previous prime is 84878051. The next prime is 84878081. The reversal of 84878066 is 66087848.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (84878051) and next prime (84878081).

It is a self number, because there is not a number n which added to its sum of digits gives 84878066.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 72401 + ... + 73563.

It is an arithmetic number, because the mean of its divisors is an integer number (4913244).

Almost surely, 2^84878066 is an apocalyptic number.

84878066 is a deficient number, since it is larger than the sum of its proper divisors (72345742).

84878066 is a wasteful number, since it uses less digits than its factorization.

84878066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1586.

The product of its (nonzero) digits is 516096, while the sum is 47.

The square root of 84878066 is about 9212.9292844350. The cubic root of 84878066 is about 439.4726222774.

The spelling of 84878066 in words is "eighty-four million, eight hundred seventy-eight thousand, sixty-six".