1668270642 has 32 divisors (see below), whose sum is σ = 3625451520. Its totient is φ = 509826960.

The previous prime is 1668270629. The next prime is 1668270677. The reversal of 1668270642 is 2460728661.

It is a junction number, because it is equal to n+sod(n) for n = 1668270594 and 1668270603.

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 15 ways as a sum of consecutive naturals, for example, 232498 + ... + 239565.

It is an arithmetic number, because the mean of its divisors is an integer number (113295360).

Almost surely, 2^1668270642 is an apocalyptic number.

1668270642 is an abundant number, since it is smaller than the sum of its proper divisors (1957180878).

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

1668270642 is a wasteful number, since it uses less digits than its factorization.

1668270642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472118.

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 1668270642 is about 40844.4689278732. The cubic root of 1668270642 is about 1186.0113241575.

The spelling of 1668270642 in words is "one billion, six hundred sixty-eight million, two hundred seventy thousand, six hundred forty-two".