497567666 has 4 divisors (see below), whose sum is σ = 746351502. Its totient is φ = 248783832.

The previous prime is 497567659. The next prime is 497567683. The reversal of 497567666 is 666765794.

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., 400840441 + 96727225 = 20021^2 + 9835^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124391915 + ... + 124391918.

Almost surely, 2^497567666 is an apocalyptic number.

497567666 is a deficient number, since it is larger than the sum of its proper divisors (248783836).

497567666 is a wasteful number, since it uses less digits than its factorization.

497567666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248783835.

The product of its digits is 11430720, while the sum is 56.

The square root of 497567666 is about 22306.2248262677. The cubic root of 497567666 is about 792.4114034844.

The spelling of 497567666 in words is "four hundred ninety-seven million, five hundred sixty-seven thousand, six hundred sixty-six".