721867363067 has 2 divisors, whose sum is σ = 721867363068. Its totient is φ = 721867363066.

The previous prime is 721867363051. The next prime is 721867363081. The reversal of 721867363067 is 760363768127.

721867363067 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 721867363067 - 2⁴ = 721867363051 is a prime.

It is a super-2 number, since 2×721867363067² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (721867363267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360933681533 + 360933681534.

It is an arithmetic number, because the mean of its divisors is an integer number (360933681534).

Almost surely, 2^721867363067 is an apocalyptic number.

721867363067 is a deficient number, since it is larger than the sum of its proper divisors (1).

721867363067 is an equidigital number, since it uses as much as digits as its factorization.

721867363067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10668672, while the sum is 56.

The spelling of 721867363067 in words is "seven hundred twenty-one billion, eight hundred sixty-seven million, three hundred sixty-three thousand, sixty-seven".