1566170425 has 24 divisors (see below), whose sum is σ = 2015978112. Its totient is φ = 1206120000.

The previous prime is 1566170387. The next prime is 1566170453. The reversal of 1566170425 is 5240716651.

It is a happy number.

It is not a de Polignac number, because 1566170425 - 2⁷ = 1566170297 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 60750 + ... + 82600.

It is an arithmetic number, because the mean of its divisors is an integer number (83999088).

Almost surely, 2^1566170425 is an apocalyptic number.

It is an amenable number.

1566170425 is a deficient number, since it is larger than the sum of its proper divisors (449807687).

1566170425 is a wasteful number, since it uses less digits than its factorization.

1566170425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21969 (or 21964 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 37.

The square root of 1566170425 is about 39574.8711305546. The cubic root of 1566170425 is about 1161.3051167236.

It can be divided in two parts, 1566 and 170425, that added together give a triangular number (171991 = T₅₈₆).

The spelling of 1566170425 in words is "one billion, five hundred sixty-six million, one hundred seventy thousand, four hundred twenty-five".