68225661 has 48 divisors (see below), whose sum is σ = 117936000. Its totient is φ = 37183104.

The previous prime is 68225639. The next prime is 68225683. The reversal of 68225661 is 16652286.

It is an interprime number because it is at equal distance from previous prime (68225639) and next prime (68225683).

It is not a de Polignac number, because 68225661 - 2⁹ = 68225149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68224661) 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 47 ways as a sum of consecutive naturals, for example, 195315 + ... + 195663.

It is an arithmetic number, because the mean of its divisors is an integer number (2457000).

Almost surely, 2^68225661 is an apocalyptic number.

It is an amenable number.

68225661 is a deficient number, since it is larger than the sum of its proper divisors (49710339).

68225661 is a wasteful number, since it uses less digits than its factorization.

68225661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498 (or 495 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 68225661 is about 8259.8826262847. The cubic root of 68225661 is about 408.6165167483.

It can be divided in two parts, 68225 and 661, that added together give a palindrome (68886).

The spelling of 68225661 in words is "sixty-eight million, two hundred twenty-five thousand, six hundred sixty-one".