665424766 has 8 divisors (see below), whose sum is σ = 998666280. Its totient is φ = 332536008.

The previous prime is 665424763. The next prime is 665424769. The reversal of 665424766 is 667424566.

It is an interprime number because it is at equal distance from previous prime (665424763) and next prime (665424769).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665424763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83421 + ... + 91048.

It is an arithmetic number, because the mean of its divisors is an integer number (124833285).

Almost surely, 2^665424766 is an apocalyptic number.

665424766 is a deficient number, since it is larger than the sum of its proper divisors (333241514).

665424766 is a wasteful number, since it uses less digits than its factorization.

665424766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176378.

The product of its digits is 1451520, while the sum is 46.

The square root of 665424766 is about 25795.8284612067. The cubic root of 665424766 is about 873.0376774719.

The spelling of 665424766 in words is "six hundred sixty-five million, four hundred twenty-four thousand, seven hundred sixty-six".