68212658 has 4 divisors (see below), whose sum is σ = 102318990. Its totient is φ = 34106328.

The previous prime is 68212657. The next prime is 68212667. The reversal of 68212658 is 85621286.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85621286 = 2 ⋅42810643.

It can be written as a sum of positive squares in only one way, i.e., 34421689 + 33790969 = 5867^2 + 5813^2 .

It is a super-2 number, since 2×68212658² = 9305933422849928, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68212657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17053163 + ... + 17053166.

Almost surely, 2^68212658 is an apocalyptic number.

68212658 is a deficient number, since it is larger than the sum of its proper divisors (34106332).

68212658 is a wasteful number, since it uses less digits than its factorization.

68212658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34106331.

The product of its digits is 46080, while the sum is 38.

The square root of 68212658 is about 8259.0954710549. The cubic root of 68212658 is about 408.5905559486.

The spelling of 68212658 in words is "sixty-eight million, two hundred twelve thousand, six hundred fifty-eight".