68138662 has 4 divisors (see below), whose sum is σ = 102207996. Its totient is φ = 34069330.

The previous prime is 68138657. The next prime is 68138663. The reversal of 68138662 is 26683186.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68138663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17034664 + ... + 17034667.

It is an arithmetic number, because the mean of its divisors is an integer number (25551999).

Almost surely, 2^68138662 is an apocalyptic number.

68138662 is a deficient number, since it is larger than the sum of its proper divisors (34069334).

68138662 is a wasteful number, since it uses less digits than its factorization.

68138662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34069333.

The product of its digits is 82944, while the sum is 40.

The square root of 68138662 is about 8254.6145882167. The cubic root of 68138662 is about 408.4427583270.

The spelling of 68138662 in words is "sixty-eight million, one hundred thirty-eight thousand, six hundred sixty-two".