1660542624 has 216 divisors, whose sum is σ = 5176751580. Its totient is φ = 504631296.

The previous prime is 1660542593. The next prime is 1660542659. The reversal of 1660542624 is 4262450661.

1660542624 is a `hidden beast` number, since 1 + 6 + 605 + 4 + 26 + 24 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 33872400 + 1626670224 = 5820^2 + 40332^2 .

It is a super-2 number, since 2×1660542624² = 5514803612241610752, which contains 22 as substring.

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 35 ways as a sum of consecutive naturals, for example, 5305092 + ... + 5305404.

Almost surely, 2^1660542624 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1660542624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2588375790).

1660542624 is an abundant number, since it is smaller than the sum of its proper divisors (3516208956).

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

1660542624 is a wasteful number, since it uses less digits than its factorization.

1660542624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464 (or 440 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 1660542624 is about 40749.7561219696. The cubic root of 1660542624 is about 1184.1771481349.

The spelling of 1660542624 in words is "one billion, six hundred sixty million, five hundred forty-two thousand, six hundred twenty-four".