453988666 has 4 divisors (see below), whose sum is σ = 680983002. Its totient is φ = 226994332.

The previous prime is 453988663. The next prime is 453988699. The reversal of 453988666 is 666889354.

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 only one way, i.e., 328660641 + 125328025 = 18129^2 + 11195^2 .

It is a super-2 number, since 2×453988666² = 412211417712919112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (453988663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113497165 + ... + 113497168.

Almost surely, 2^453988666 is an apocalyptic number.

453988666 is a deficient number, since it is larger than the sum of its proper divisors (226994336).

453988666 is a wasteful number, since it uses less digits than its factorization.

453988666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226994335.

The product of its digits is 7464960, while the sum is 55.

The square root of 453988666 is about 21307.0097855142. The cubic root of 453988666 is about 768.5668885398.

The spelling of 453988666 in words is "four hundred fifty-three million, nine hundred eighty-eight thousand, six hundred sixty-six".