722166587 has 2 divisors, whose sum is σ = 722166588. Its totient is φ = 722166586.

The previous prime is 722166551. The next prime is 722166637. The reversal of 722166587 is 785661227.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 722166587 - 2⁸ = 722166331 is a prime.

It is not a weakly prime, because it can be changed into another prime (722166517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361083293 + 361083294.

It is an arithmetic number, because the mean of its divisors is an integer number (361083294).

Almost surely, 2^722166587 is an apocalyptic number.

722166587 is a deficient number, since it is larger than the sum of its proper divisors (1).

722166587 is an equidigital number, since it uses as much as digits as its factorization.

722166587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 282240, while the sum is 44.

The square root of 722166587 is about 26873.1573693900. The cubic root of 722166587 is about 897.1790632514.

The spelling of 722166587 in words is "seven hundred twenty-two million, one hundred sixty-six thousand, five hundred eighty-seven".