67726961 has 2 divisors, whose sum is σ = 67726962. Its totient is φ = 67726960.

The previous prime is 67726949. The next prime is 67726993. The reversal of 67726961 is 16962776.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66994225 + 732736 = 8185^2 + 856^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67726961 is a prime.

It is not a weakly prime, because it can be changed into another prime (67722961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33863480 + 33863481.

It is an arithmetic number, because the mean of its divisors is an integer number (33863481).

Almost surely, 2^67726961 is an apocalyptic number.

It is an amenable number.

67726961 is a deficient number, since it is larger than the sum of its proper divisors (1).

67726961 is an equidigital number, since it uses as much as digits as its factorization.

67726961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 44.

The square root of 67726961 is about 8229.6391779956. The cubic root of 67726961 is about 407.6184778513.

The spelling of 67726961 in words is "sixty-seven million, seven hundred twenty-six thousand, nine hundred sixty-one".