1666036446 has 16 divisors (see below), whose sum is σ = 3332617104. Its totient is φ = 555254784.

The previous prime is 1666036439. The next prime is 1666036447. The reversal of 1666036446 is 6446306661.

It is a junction number, because it is equal to n+sod(n) for n = 1666036398 and 1666036407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666036447) 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, 24756 + ... + 62808.

It is an arithmetic number, because the mean of its divisors is an integer number (208288569).

Almost surely, 2^1666036446 is an apocalyptic number.

1666036446 is an abundant number, since it is smaller than the sum of its proper divisors (1666580658).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1666036446 is a wasteful number, since it uses less digits than its factorization.

1666036446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45355.

The product of its (nonzero) digits is 373248, while the sum is 42.

The square root of 1666036446 is about 40817.1097212921. The cubic root of 1666036446 is about 1185.4816408118.

The spelling of 1666036446 in words is "one billion, six hundred sixty-six million, thirty-six thousand, four hundred forty-six".