1566426542 has 8 divisors (see below), whose sum is σ = 2349809136. Its totient is φ = 783156832.

The previous prime is 1566426541. The next prime is 1566426583. The reversal of 1566426542 is 2456246651.

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

It is a super-2 number, since 2×1566426542² = 4907384222964155528, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1566426542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1566426541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33263 + ... + 65109.

It is an arithmetic number, because the mean of its divisors is an integer number (293726142).

Almost surely, 2^1566426542 is an apocalyptic number.

1566426542 is a deficient number, since it is larger than the sum of its proper divisors (783382594).

1566426542 is a wasteful number, since it uses less digits than its factorization.

1566426542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56442.

The product of its digits is 345600, while the sum is 41.

The square root of 1566426542 is about 39578.1068521474. The cubic root of 1566426542 is about 1161.3684162995.

The spelling of 1566426542 in words is "one billion, five hundred sixty-six million, four hundred twenty-six thousand, five hundred forty-two".