866604469 has 2 divisors, whose sum is σ = 866604470. Its totient is φ = 866604468.

The previous prime is 866604457. The next prime is 866604517. The reversal of 866604469 is 964406668.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 864948100 + 1656369 = 29410^2 + 1287^2 .

It is a cyclic number.

It is not a de Polignac number, because 866604469 - 2²¹ = 864507317 is a prime.

It is a super-2 number, since 2×866604469² = 1502006611381543922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866604569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433302234 + 433302235.

It is an arithmetic number, because the mean of its divisors is an integer number (433302235).

Almost surely, 2^866604469 is an apocalyptic number.

It is an amenable number.

866604469 is a deficient number, since it is larger than the sum of its proper divisors (1).

866604469 is an equidigital number, since it uses as much as digits as its factorization.

866604469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1492992, while the sum is 49.

The square root of 866604469 is about 29438.1464939626. The cubic root of 866604469 is about 953.3966935763.

The spelling of 866604469 in words is "eight hundred sixty-six million, six hundred four thousand, four hundred sixty-nine".