67722128501 has 2 divisors, whose sum is σ = 67722128502. Its totient is φ = 67722128500.

The previous prime is 67722128483. The next prime is 67722128531. The reversal of 67722128501 is 10582122776.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40348756900 + 27373371601 = 200870^2 + 165449^2 .

It is a cyclic number.

It is not a de Polignac number, because 67722128501 - 2⁶ = 67722128437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67722128531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33861064250 + 33861064251.

It is an arithmetic number, because the mean of its divisors is an integer number (33861064251).

Almost surely, 2^67722128501 is an apocalyptic number.

It is an amenable number.

67722128501 is a deficient number, since it is larger than the sum of its proper divisors (1).

67722128501 is an equidigital number, since it uses as much as digits as its factorization.

67722128501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 94080, while the sum is 41.

The spelling of 67722128501 in words is "sixty-seven billion, seven hundred twenty-two million, one hundred twenty-eight thousand, five hundred one".