1668135458 has 32 divisors (see below), whose sum is σ = 2757343680. Its totient is φ = 750600000.

The previous prime is 1668135433. The next prime is 1668135461. The reversal of 1668135458 is 8545318661.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 998648 + ... + 1000316.

It is an arithmetic number, because the mean of its divisors is an integer number (86166990).

Almost surely, 2^1668135458 is an apocalyptic number.

1668135458 is a deficient number, since it is larger than the sum of its proper divisors (1089208222).

1668135458 is a wasteful number, since it uses less digits than its factorization.

1668135458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2114.

The product of its digits is 691200, while the sum is 47.

The square root of 1668135458 is about 40842.8140313569. The cubic root of 1668135458 is about 1185.9792881713.

It can be divided in two parts, 166813 and 5458, that added together give a palindrome (172271).

The spelling of 1668135458 in words is "one billion, six hundred sixty-eight million, one hundred thirty-five thousand, four hundred fifty-eight".