1660552740 has 144 divisors (see below), whose sum is σ = 6279960960. Its totient is φ = 345047040.

The previous prime is 1660552721. The next prime is 1660552769. The reversal of 1660552740 is 472550661.

It is a happy number.

1660552740 is a `hidden beast` number, since 1 + 6 + 60 + 552 + 7 + 40 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 1660552695 and 1660552704.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 46045 + ... + 73764.

It is an arithmetic number, because the mean of its divisors is an integer number (43610840).

Almost surely, 2^1660552740 is an apocalyptic number.

1660552740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1660552740 is an abundant number, since it is smaller than the sum of its proper divisors (4619408220).

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

1660552740 is a wasteful number, since it uses less digits than its factorization.

1660552740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119842 (or 119837 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 1660552740 is about 40749.8802452228. The cubic root of 1660552740 is about 1184.1795527930.

The spelling of 1660552740 in words is "one billion, six hundred sixty million, five hundred fifty-two thousand, seven hundred forty".