68566144 has 16 divisors (see below), whose sum is σ = 136596870. Its totient is φ = 34283008.

The previous prime is 68566103. The next prime is 68566163. The reversal of 68566144 is 44166586.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 68558400 + 7744 = 8280^2 + 88^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-2 number, since 2×68566144² = 9402632206057472, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 68566097 and 68566106.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 267709 + ... + 267964.

Almost surely, 2^68566144 is an apocalyptic number.

68566144 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

68566144 is a deficient number, since it is larger than the sum of its proper divisors (68030726).

68566144 is an equidigital number, since it uses as much as digits as its factorization.

68566144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535687 (or 535675 counting only the distinct ones).

The product of its digits is 138240, while the sum is 40.

The square root of 68566144 is about 8280.4676196456. The cubic root of 68566144 is about 409.2951283602.

The spelling of 68566144 in words is "sixty-eight million, five hundred sixty-six thousand, one hundred forty-four".