84666399 has 8 divisors (see below), whose sum is σ = 116781360. Its totient is φ = 54497856.

The previous prime is 84666371. The next prime is 84666403. The reversal of 84666399 is 99366648.

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

It is not a de Polignac number, because 84666399 - 2⁵ = 84666367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84666319) 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, 486502 + ... + 486675.

It is an arithmetic number, because the mean of its divisors is an integer number (14597670).

Almost surely, 2^84666399 is an apocalyptic number.

84666399 is a deficient number, since it is larger than the sum of its proper divisors (32114961).

84666399 is a wasteful number, since it uses less digits than its factorization.

84666399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973209.

The product of its digits is 1679616, while the sum is 51.

The square root of 84666399 is about 9201.4346164063. The cubic root of 84666399 is about 439.1070025576.

It can be divided in two parts, 8466639 and 9, that added together give a palindrome (8466648).

The spelling of 84666399 in words is "eighty-four million, six hundred sixty-six thousand, three hundred ninety-nine".