662981938 has 8 divisors (see below), whose sum is σ = 1011328560. Its totient is φ = 325872420.

The previous prime is 662981933. The next prime is 662981939. The reversal of 662981938 is 839189266.

It is a happy number.

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

It is a super-5 number, since 5×662981938⁵ (a number of 45 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (662981933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2809128 + ... + 2809363.

It is an arithmetic number, because the mean of its divisors is an integer number (126416070).

Almost surely, 2^662981938 is an apocalyptic number.

662981938 is a deficient number, since it is larger than the sum of its proper divisors (348346622).

662981938 is a wasteful number, since it uses less digits than its factorization.

662981938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5618552.

The product of its digits is 1119744, while the sum is 52.

The square root of 662981938 is about 25748.4356418016. The cubic root of 662981938 is about 871.9680369074.

The spelling of 662981938 in words is "six hundred sixty-two million, nine hundred eighty-one thousand, nine hundred thirty-eight".