1566666016 has 12 divisors (see below), whose sum is σ = 3084373782. Its totient is φ = 783332992.

The previous prime is 1566666011. The next prime is 1566666053. The reversal of 1566666016 is 6106666651.

It can be written as a sum of positive squares in only one way, i.e., 1563411600 + 3254416 = 39540^2 + 1804^2 .

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1566666011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24479125 + ... + 24479188.

Almost surely, 2^1566666016 is an apocalyptic number.

1566666016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1566666016 is a deficient number, since it is larger than the sum of its proper divisors (1517707766).

1566666016 is an equidigital number, since it uses as much as digits as its factorization.

1566666016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48958323 (or 48958315 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 43.

The square root of 1566666016 is about 39581.1320707228. The cubic root of 1566666016 is about 1161.4275962995.

The spelling of 1566666016 in words is "one billion, five hundred sixty-six million, six hundred sixty-six thousand, sixteen".