68067621 has 10 divisors (see below), whose sum is σ = 101681382. Its totient is φ = 45378360.

The previous prime is 68067619. The next prime is 68067631. The reversal of 68067621 is 12676086.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 66341025 + 1726596 = 8145^2 + 1314^2 .

It is not a de Polignac number, because 68067621 - 2¹ = 68067619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68067631) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 420090 + ... + 420251.

Almost surely, 2^68067621 is an apocalyptic number.

It is an amenable number.

68067621 is a deficient number, since it is larger than the sum of its proper divisors (33613761).

68067621 is an equidigital number, since it uses as much as digits as its factorization.

68067621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840353 (or 840344 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 68067621 is about 8250.3103577987. The cubic root of 68067621 is about 408.3007622315.

The spelling of 68067621 in words is "sixty-eight million, sixty-seven thousand, six hundred twenty-one".