1668628662 has 8 divisors (see below), whose sum is σ = 3337257336. Its totient is φ = 556209552.

The previous prime is 1668628607. The next prime is 1668628667. The reversal of 1668628662 is 2668268661.

It is a sphenic number, since it is the product of 3 distinct primes.

1668628662 is an admirable number.

It is a super-2 number, since 2×1668628662² = 5568643223295820488, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668628667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139052383 + ... + 139052394.

It is an arithmetic number, because the mean of its divisors is an integer number (417157167).

Almost surely, 2^1668628662 is an apocalyptic number.

1668628662 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1668628662 is a wasteful number, since it uses less digits than its factorization.

1668628662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278104782.

The product of its digits is 1990656, while the sum is 51.

The square root of 1668628662 is about 40848.8514159211. The cubic root of 1668628662 is about 1186.0961595937.

The spelling of 1668628662 in words is "one billion, six hundred sixty-eight million, six hundred twenty-eight thousand, six hundred sixty-two".