67878849 has 16 divisors (see below), whose sum is σ = 97070400. Its totient is φ = 42060096.

The previous prime is 67878847. The next prime is 67878869. The reversal of 67878849 is 94887876.

It is not a de Polignac number, because 67878849 - 2¹ = 67878847 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (67878847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8214 + ... + 14255.

It is an arithmetic number, because the mean of its divisors is an integer number (6066900).

Almost surely, 2^67878849 is an apocalyptic number.

It is an amenable number.

67878849 is a deficient number, since it is larger than the sum of its proper divisors (29191551).

67878849 is a wasteful number, since it uses less digits than its factorization.

67878849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22544.

The product of its digits is 5419008, while the sum is 57.

The square root of 67878849 is about 8238.8621180355. The cubic root of 67878849 is about 407.9229658002.

The spelling of 67878849 in words is "sixty-seven million, eight hundred seventy-eight thousand, eight hundred forty-nine".