67616749 has 8 divisors (see below), whose sum is σ = 69524280. Its totient is φ = 65721600.

The previous prime is 67616741. The next prime is 67616753. The reversal of 67616749 is 94761676.

It can be written as a sum of positive squares in 4 ways, for example, as 81225 + 67535524 = 285^2 + 8218^2 .

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 67616749 - 2³ = 67616741 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 67616699 and 67616708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67616741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8587 + ... + 14455.

It is an arithmetic number, because the mean of its divisors is an integer number (8690535).

Almost surely, 2^67616749 is an apocalyptic number.

It is an amenable number.

67616749 is a deficient number, since it is larger than the sum of its proper divisors (1907531).

67616749 is a wasteful number, since it uses less digits than its factorization.

67616749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6191.

The product of its digits is 381024, while the sum is 46.

The square root of 67616749 is about 8222.9404108263. The cubic root of 67616749 is about 407.3972521259.

The spelling of 67616749 in words is "sixty-seven million, six hundred sixteen thousand, seven hundred forty-nine".