82664399 has 8 divisors (see below), whose sum is σ = 85686528. Its totient is φ = 79695000.

The previous prime is 82664389. The next prime is 82664411. The reversal of 82664399 is 99346628.

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

It is a cyclic number.

It is not a de Polignac number, because 82664399 - 2²⁰ = 81615823 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82664339) 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, 9977 + ... + 16274.

It is an arithmetic number, because the mean of its divisors is an integer number (10710816).

Almost surely, 2^82664399 is an apocalyptic number.

82664399 is a deficient number, since it is larger than the sum of its proper divisors (3022129).

82664399 is a wasteful number, since it uses less digits than its factorization.

82664399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26365.

The product of its digits is 559872, while the sum is 47.

The square root of 82664399 is about 9091.9964254282. The cubic root of 82664399 is about 435.6183551850.

The spelling of 82664399 in words is "eighty-two million, six hundred sixty-four thousand, three hundred ninety-nine".