1660742688 has 96 divisors (see below), whose sum is σ = 4766936832. Its totient is φ = 502073600.

The previous prime is 1660742687. The next prime is 1660742701. The reversal of 1660742688 is 8862470661.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (1660742687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 516895 + ... + 520097.

It is an arithmetic number, because the mean of its divisors is an integer number (49655592).

Almost surely, 2^1660742688 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 1660742688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2383468416).

1660742688 is an abundant number, since it is smaller than the sum of its proper divisors (3106194144).

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

1660742688 is a wasteful number, since it uses less digits than its factorization.

1660742688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3718 (or 3710 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 48.

The square root of 1660742688 is about 40752.2108357326. The cubic root of 1660742688 is about 1184.2247032132.

It can be divided in two parts, 16607 and 42688, that added together give a palindrome (59295).

The spelling of 1660742688 in words is "one billion, six hundred sixty million, seven hundred forty-two thousand, six hundred eighty-eight".