64683818 has 8 divisors (see below), whose sum is σ = 97071780. Its totient is φ = 32326560.

The previous prime is 64683803. The next prime is 64683823. The reversal of 64683818 is 81838646.

It can be written as a sum of positive squares in 2 ways, for example, as 61418569 + 3265249 = 7837^2 + 1807^2 .

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

It is a super-2 number, since 2×64683818² = 8367992622114248, which contains 22 as substring.

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, 1373 + ... + 11456.

Almost surely, 2^64683818 is an apocalyptic number.

64683818 is a deficient number, since it is larger than the sum of its proper divisors (32387962).

64683818 is a wasteful number, since it uses less digits than its factorization.

64683818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15352.

The product of its digits is 221184, while the sum is 44.

The square root of 64683818 is about 8042.6250689685. The cubic root of 64683818 is about 401.4195768772.

The spelling of 64683818 in words is "sixty-four million, six hundred eighty-three thousand, eight hundred eighteen".