67982661 has 12 divisors (see below), whose sum is σ = 98514988. Its totient is φ = 45175104.

The previous prime is 67982647. The next prime is 67982669. The reversal of 67982661 is 16628976.

It can be written as a sum of positive squares in 2 ways, for example, as 10692900 + 57289761 = 3270^2 + 7569^2 .

It is not a de Polignac number, because 67982661 - 2⁹ = 67982149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67982669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9250 + ... + 14883.

Almost surely, 2^67982661 is an apocalyptic number.

It is an amenable number.

67982661 is a deficient number, since it is larger than the sum of its proper divisors (30532327).

67982661 is a wasteful number, since it uses less digits than its factorization.

67982661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24452 (or 24449 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 67982661 is about 8245.1598529076. The cubic root of 67982661 is about 408.1308151751.

The spelling of 67982661 in words is "sixty-seven million, nine hundred eighty-two thousand, six hundred sixty-one".