665154466 has 4 divisors (see below), whose sum is σ = 997731702. Its totient is φ = 332577232.

The previous prime is 665154463. The next prime is 665154467. The reversal of 665154466 is 664451566.

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., 664144441 + 1010025 = 25771^2 + 1005^2 .

It is not an unprimeable number, because it can be changed into a prime (665154463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166288615 + ... + 166288618.

Almost surely, 2^665154466 is an apocalyptic number.

665154466 is a deficient number, since it is larger than the sum of its proper divisors (332577236).

665154466 is a wasteful number, since it uses less digits than its factorization.

665154466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332577235.

The product of its digits is 518400, while the sum is 43.

The square root of 665154466 is about 25790.5887098375. The cubic root of 665154466 is about 872.9194502102.

The spelling of 665154466 in words is "six hundred sixty-five million, one hundred fifty-four thousand, four hundred sixty-six".