699668161 has 4 divisors (see below), whose sum is σ = 708524800. Its totient is φ = 690811524.

The previous prime is 699668153. The next prime is 699668183. The reversal of 699668161 is 161866996.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 699668161 - 2³ = 699668153 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 699668099 and 699668108.

It is not an unprimeable number, because it can be changed into a prime (699668191) 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, 4428201 + ... + 4428358.

It is an arithmetic number, because the mean of its divisors is an integer number (177131200).

Almost surely, 2^699668161 is an apocalyptic number.

It is an amenable number.

699668161 is a deficient number, since it is larger than the sum of its proper divisors (8856639).

699668161 is an equidigital number, since it uses as much as digits as its factorization.

699668161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8856638.

The product of its digits is 839808, while the sum is 52.

The square root of 699668161 is about 26451.2411996110. The cubic root of 699668161 is about 887.7636742440.

It can be divided in two parts, 6996 and 68161, that added together give a palindrome (75157).

The spelling of 699668161 in words is "six hundred ninety-nine million, six hundred sixty-eight thousand, one hundred sixty-one".