83666638 has 8 divisors (see below), whose sum is σ = 136909080. Its totient is φ = 38030280.

The previous prime is 83666621. The next prime is 83666641.

83666638 is nontrivially palindromic in base 10.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1901493 + ... + 1901536.

It is an arithmetic number, because the mean of its divisors is an integer number (17113635).

Almost surely, 2^83666638 is an apocalyptic number.

83666638 is a deficient number, since it is larger than the sum of its proper divisors (53242442).

83666638 is a wasteful number, since it uses less digits than its factorization.

83666638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3803042.

The product of its digits is 746496, while the sum is 46.

The square root of 83666638 is about 9146.9469223342. The cubic root of 83666638 is about 437.3717945975.

The spelling of 83666638 in words is "eighty-three million, six hundred sixty-six thousand, six hundred thirty-eight".