689565466 has 4 divisors (see below), whose sum is σ = 1034348202. Its totient is φ = 344782732.

The previous prime is 689565463. The next prime is 689565491. The reversal of 689565466 is 664565986.

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

It can be written as a sum of positive squares in only one way, i.e., 649179441 + 40386025 = 25479^2 + 6355^2 .

It is not an unprimeable number, because it can be changed into a prime (689565463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172391365 + ... + 172391368.

Almost surely, 2^689565466 is an apocalyptic number.

689565466 is a deficient number, since it is larger than the sum of its proper divisors (344782736).

689565466 is a wasteful number, since it uses less digits than its factorization.

689565466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344782735.

The product of its digits is 9331200, while the sum is 55.

The square root of 689565466 is about 26259.5785571665. The cubic root of 689565466 is about 883.4700564761.

It can be divided in two parts, 6895 and 65466, that added together give a square (72361 = 269²).

The spelling of 689565466 in words is "six hundred eighty-nine million, five hundred sixty-five thousand, four hundred sixty-six".