1668333534 has 64 divisors (see below), whose sum is σ = 3881533440. Its totient is φ = 468205920.

The previous prime is 1668333517. The next prime is 1668333559. The reversal of 1668333534 is 4353338661.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 698907 + ... + 701289.

It is an arithmetic number, because the mean of its divisors is an integer number (60648960).

Almost surely, 2^1668333534 is an apocalyptic number.

1668333534 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1668333534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1940766720).

1668333534 is an abundant number, since it is smaller than the sum of its proper divisors (2213199906).

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

1668333534 is a wasteful number, since it uses less digits than its factorization.

1668333534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2685.

The product of its digits is 466560, while the sum is 42.

The square root of 1668333534 is about 40845.2388167826. The cubic root of 1668333534 is about 1186.0262277518.

The spelling of 1668333534 in words is "one billion, six hundred sixty-eight million, three hundred thirty-three thousand, five hundred thirty-four".