699666553 has 4 divisors (see below), whose sum is σ = 700808548. Its totient is φ = 698524560.

The previous prime is 699666551. The next prime is 699666577. The reversal of 699666553 is 355666996.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35676729 + 663989824 = 5973^2 + 25768^2 .

It is a cyclic number.

It is not a de Polignac number, because 699666553 - 2¹ = 699666551 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 699666494 and 699666503.

It is not an unprimeable number, because it can be changed into a prime (699666551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 570078 + ... + 571303.

It is an arithmetic number, because the mean of its divisors is an integer number (175202137).

Almost surely, 2^699666553 is an apocalyptic number.

It is an amenable number.

699666553 is a deficient number, since it is larger than the sum of its proper divisors (1141995).

699666553 is a wasteful number, since it uses less digits than its factorization.

699666553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1141994.

The product of its digits is 7873200, while the sum is 55.

The square root of 699666553 is about 26451.2108040445. The cubic root of 699666553 is about 887.7629941477.

The spelling of 699666553 in words is "six hundred ninety-nine million, six hundred sixty-six thousand, five hundred fifty-three".