662981849 has 8 divisors (see below), whose sum is σ = 679573608. Its totient is φ = 646410240.

The previous prime is 662981843. The next prime is 662981863. The reversal of 662981849 is 948189266.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 74046025 + 588935824 = 8605^2 + 24268^2 .

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 662981849 - 2¹² = 662977753 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 662981849.

It is not an unprimeable number, because it can be changed into a prime (662981843) 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, 78689 + ... + 86705.

It is an arithmetic number, because the mean of its divisors is an integer number (84946701).

Almost surely, 2^662981849 is an apocalyptic number.

It is an amenable number.

662981849 is a deficient number, since it is larger than the sum of its proper divisors (16591759).

662981849 is a wasteful number, since it uses less digits than its factorization.

662981849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10075.

The product of its digits is 1492992, while the sum is 53.

The square root of 662981849 is about 25748.4339135412. The cubic root of 662981849 is about 871.9679978892.

The spelling of 662981849 in words is "six hundred sixty-two million, nine hundred eighty-one thousand, eight hundred forty-nine".