966664442 has 16 divisors (see below), whose sum is σ = 1492103592. Its totient is φ = 469347840.

The previous prime is 966664441. The next prime is 966664487. The reversal of 966664442 is 244466669.

It can be written as a sum of positive squares in 4 ways, for example, as 867243601 + 99420841 = 29449^2 + 9971^2 .

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (966664441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26018 + ... + 51090.

Almost surely, 2^966664442 is an apocalyptic number.

966664442 is a deficient number, since it is larger than the sum of its proper divisors (525439150).

966664442 is a wasteful number, since it uses less digits than its factorization.

966664442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25633.

The product of its digits is 1492992, while the sum is 47.

The square root of 966664442 is about 31091.2277338802. The cubic root of 966664442 is about 988.7623352748.

The spelling of 966664442 in words is "nine hundred sixty-six million, six hundred sixty-four thousand, four hundred forty-two".