1668730470 has 128 divisors (see below), whose sum is σ = 4558602240. Its totient is φ = 387233280.

The previous prime is 1668730429. The next prime is 1668730487. The reversal of 1668730470 is 740378661.

It is a super-2 number, since 2×1668730470² = 5569322763012841800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1214704 + ... + 1216076.

It is an arithmetic number, because the mean of its divisors is an integer number (35614080).

Almost surely, 2^1668730470 is an apocalyptic number.

1668730470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1668730470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2279301120).

1668730470 is an abundant number, since it is smaller than the sum of its proper divisors (2889871770).

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

1668730470 is a wasteful number, since it uses less digits than its factorization.

1668730470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1550.

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 1668730470 is about 40850.0975519031. The cubic root of 1668730470 is about 1186.1202815218.

The spelling of 1668730470 in words is "one billion, six hundred sixty-eight million, seven hundred thirty thousand, four hundred seventy".