445374666 has 64 divisors (see below), whose sum is σ = 1093478400. Its totient is φ = 133239600.

The previous prime is 445374647. The next prime is 445374673. The reversal of 445374666 is 666473544.

It is a happy number.

It is a super-2 number, since 2×445374666² = 396717186229223112, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42181 + ... + 51671.

It is an arithmetic number, because the mean of its divisors is an integer number (17085600).

Almost surely, 2^445374666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 445374666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (546739200).

445374666 is an abundant number, since it is smaller than the sum of its proper divisors (648103734).

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

445374666 is a wasteful number, since it uses less digits than its factorization.

445374666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9592 (or 9586 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 45.

The square root of 445374666 is about 21103.9016771781. The cubic root of 445374666 is about 763.6748762812.

It can be divided in two parts, 445374 and 666, that added together give a triangular number (446040 = T₉₄₄).

The spelling of 445374666 in words is "four hundred forty-five million, three hundred seventy-four thousand, six hundred sixty-six".