1668069312 has 112 divisors (see below), whose sum is σ = 5431974912. Its totient is φ = 439925760.

The previous prime is 1668069307. The next prime is 1668069383. The reversal of 1668069312 is 2139608661.

It is a tau number, because it is divible by the number of its divisors (112).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

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 15 ways as a sum of consecutive naturals, for example, 30264 + ... + 65207.

It is an arithmetic number, because the mean of its divisors is an integer number (48499776).

Almost surely, 2^1668069312 is an apocalyptic number.

1668069312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1668069312 is an abundant number, since it is smaller than the sum of its proper divisors (3763905600).

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

1668069312 is a wasteful number, since it uses less digits than its factorization.

1668069312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95506 (or 95496 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 1668069312 is about 40842.0042603200. The cubic root of 1668069312 is about 1185.9636122215.

The spelling of 1668069312 in words is "one billion, six hundred sixty-eight million, sixty-nine thousand, three hundred twelve".