84819666 has 16 divisors (see below), whose sum is σ = 170352000. Its totient is φ = 28154448.

The previous prime is 84819661. The next prime is 84819671. The reversal of 84819666 is 66691848.

It is an interprime number because it is at equal distance from previous prime (84819661) and next prime (84819671).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (84819661) 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, 28141 + ... + 31008.

It is an arithmetic number, because the mean of its divisors is an integer number (10647000).

Almost surely, 2^84819666 is an apocalyptic number.

84819666 is an abundant number, since it is smaller than the sum of its proper divisors (85532334).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

84819666 is a wasteful number, since it uses less digits than its factorization.

84819666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59393.

The product of its digits is 497664, while the sum is 48.

The square root of 84819666 is about 9209.7592802418. The cubic root of 84819666 is about 439.3718067158.

The spelling of 84819666 in words is "eighty-four million, eight hundred nineteen thousand, six hundred sixty-six".