699866998669 has 2 divisors, whose sum is σ = 699866998670. Its totient is φ = 699866998668.

The previous prime is 699866998657. The next prime is 699866998709. The reversal of 699866998669 is 966899668996.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 654076562500 + 45790436169 = 808750^2 + 213987^2 .

It is a cyclic number.

It is not a de Polignac number, because 699866998669 - 2¹⁷ = 699866867597 is a prime.

It is a super-2 number, since 2×699866998669² (a number of 24 digits) contains 22 as substring.

699866998669 is a strobogrammatic number because it is the same when read upside-down.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (699866918669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349933499334 + 349933499335.

It is an arithmetic number, because the mean of its divisors is an integer number (349933499335).

Almost surely, 2^699866998669 is an apocalyptic number.

It is an amenable number.

699866998669 is a deficient number, since it is larger than the sum of its proper divisors (1).

699866998669 is an equidigital number, since it uses as much as digits as its factorization.

699866998669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29386561536, while the sum is 91.

The spelling of 699866998669 in words is "six hundred ninety-nine billion, eight hundred sixty-six million, nine hundred ninety-eight thousand, six hundred sixty-nine".