1566442466 has 4 divisors (see below), whose sum is σ = 2349663702. Its totient is φ = 783221232.

The previous prime is 1566442459. The next prime is 1566442469. The reversal of 1566442466 is 6642446651.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1562541841 + 3900625 = 39529^2 + 1975^2 .

It is a super-2 number, since 2×1566442466² = 4907483998576322312, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1566442469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 391610615 + ... + 391610618.

Almost surely, 2^1566442466 is an apocalyptic number.

1566442466 is a deficient number, since it is larger than the sum of its proper divisors (783221236).

1566442466 is an equidigital number, since it uses as much as digits as its factorization.

1566442466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 783221235.

The product of its digits is 829440, while the sum is 44.

The square root of 1566442466 is about 39578.3080234615. The cubic root of 1566442466 is about 1161.3723517044.

The spelling of 1566442466 in words is "one billion, five hundred sixty-six million, four hundred forty-two thousand, four hundred sixty-six".