67778056 has 16 divisors (see below), whose sum is σ = 132609600. Its totient is φ = 32415504.

The previous prime is 67778041. The next prime is 67778063. The reversal of 67778056 is 65087776.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a junction number, because it is equal to n+sod(n) for n = 67777997 and 67778015.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183996 + ... + 184363.

It is an arithmetic number, because the mean of its divisors is an integer number (8288100).

Almost surely, 2^67778056 is an apocalyptic number.

It is an amenable number.

67778056 is a deficient number, since it is larger than the sum of its proper divisors (64831544).

67778056 is a wasteful number, since it uses less digits than its factorization.

67778056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368388 (or 368384 counting only the distinct ones).

The product of its (nonzero) digits is 493920, while the sum is 46.

The square root of 67778056 is about 8232.7429208011. The cubic root of 67778056 is about 407.7209581165.

The spelling of 67778056 in words is "sixty-seven million, seven hundred seventy-eight thousand, fifty-six".