68661213 has 8 divisors (see below), whose sum is σ = 91812000. Its totient is φ = 45642288.

The previous prime is 68661211. The next prime is 68661217. The reversal of 68661213 is 31216686.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68661213 - 2¹ = 68661211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68661211) 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, 31743 + ... + 33836.

It is an arithmetic number, because the mean of its divisors is an integer number (11476500).

Almost surely, 2^68661213 is an apocalyptic number.

It is an amenable number.

68661213 is a deficient number, since it is larger than the sum of its proper divisors (23150787).

68661213 is a wasteful number, since it uses less digits than its factorization.

68661213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65931.

The product of its digits is 10368, while the sum is 33.

The square root of 68661213 is about 8286.2061886004. The cubic root of 68661213 is about 409.4842076261.

Adding to 68661213 its reverse (31216686), we get a palindrome (99877899).

The spelling of 68661213 in words is "sixty-eight million, six hundred sixty-one thousand, two hundred thirteen".