1566661430 has 8 divisors (see below), whose sum is σ = 2819990592. Its totient is φ = 626664568.

The previous prime is 1566661427. The next prime is 1566661433. The reversal of 1566661430 is 341666651.

It is an interprime number because it is at equal distance from previous prime (1566661427) and next prime (1566661433).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1566661433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78333062 + ... + 78333081.

It is an arithmetic number, because the mean of its divisors is an integer number (352498824).

Almost surely, 2^1566661430 is an apocalyptic number.

1566661430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1566661430 is a deficient number, since it is larger than the sum of its proper divisors (1253329162).

1566661430 is a wasteful number, since it uses less digits than its factorization.

1566661430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156666150.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 1566661430 is about 39581.0741390377. The cubic root of 1566661430 is about 1161.4264630412.

The spelling of 1566661430 in words is "one billion, five hundred sixty-six million, six hundred sixty-one thousand, four hundred thirty".