1659542770 has 16 divisors (see below), whose sum is σ = 2987950680. Its totient is φ = 663645184.

The previous prime is 1659542761. The next prime is 1659542791. The reversal of 1659542770 is 772459561.

It can be written as a sum of positive squares in 4 ways, for example, as 1659503169 + 39601 = 40737^2 + 199^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1659542770.

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 7 ways as a sum of consecutive naturals, for example, 23544 + ... + 62236.

Almost surely, 2^1659542770 is an apocalyptic number.

1659542770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1659542770 is a deficient number, since it is larger than the sum of its proper divisors (1328407910).

1659542770 is a wasteful number, since it uses less digits than its factorization.

1659542770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42989.

The product of its (nonzero) digits is 529200, while the sum is 46.

The square root of 1659542770 is about 40737.4860540019. The cubic root of 1659542770 is about 1183.9394262481.

The spelling of 1659542770 in words is "one billion, six hundred fifty-nine million, five hundred forty-two thousand, seven hundred seventy".