666463445 has 8 divisors (see below), whose sum is σ = 800044344. Its totient is φ = 532978624.

The previous prime is 666463403. The next prime is 666463453. The reversal of 666463445 is 544364666.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 23435281 + 643028164 = 4841^2 + 25358^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 666463445 - 2⁶ = 666463381 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 666463396 and 666463405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7754 + ... + 37323.

It is an arithmetic number, because the mean of its divisors is an integer number (100005543).

Almost surely, 2^666463445 is an apocalyptic number.

It is an amenable number.

666463445 is a deficient number, since it is larger than the sum of its proper divisors (133580899).

666463445 is a wasteful number, since it uses less digits than its factorization.

666463445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48039.

The product of its digits is 1244160, while the sum is 44.

The square root of 666463445 is about 25815.9533041102. The cubic root of 666463445 is about 873.4916904763.

The spelling of 666463445 in words is "six hundred sixty-six million, four hundred sixty-three thousand, four hundred forty-five".