1660565412 has 72 divisors (see below), whose sum is σ = 4605793920. Its totient is φ = 500272320.

The previous prime is 1660565371. The next prime is 1660565429. The reversal of 1660565412 is 2145650661.

1660565412 is a `hidden beast` number, since 1 + 6 + 60 + 56 + 541 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 56389 + ... + 80627.

It is an arithmetic number, because the mean of its divisors is an integer number (63969360).

Almost surely, 2^1660565412 is an apocalyptic number.

1660565412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1660565412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2302896960).

1660565412 is an abundant number, since it is smaller than the sum of its proper divisors (2945228508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1660565412 is a wasteful number, since it uses less digits than its factorization.

1660565412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24433 (or 24428 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 1660565412 is about 40750.0357300457. The cubic root of 1660565412 is about 1184.1825650199.

The spelling of 1660565412 in words is "one billion, six hundred sixty million, five hundred sixty-five thousand, four hundred twelve".