1668956952 has 64 divisors (see below), whose sum is σ = 4554960480. Its totient is φ = 506483712.

The previous prime is 1668956881. The next prime is 1668956953. The reversal of 1668956952 is 2596598661.

It is a junction number, because it is equal to n+sod(n) for n = 1668956892 and 1668956901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668956953) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13863 + ... + 59414.

Almost surely, 2^1668956952 is an apocalyptic number.

1668956952 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1668956952 is an abundant number, since it is smaller than the sum of its proper divisors (2886003528).

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

1668956952 is a wasteful number, since it uses less digits than its factorization.

1668956952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73372 (or 73368 counting only the distinct ones).

The product of its digits is 6998400, while the sum is 57.

The square root of 1668956952 is about 40852.8695687341. The cubic root of 1668956952 is about 1186.1739396262.

The spelling of 1668956952 in words is "one billion, six hundred sixty-eight million, nine hundred fifty-six thousand, nine hundred fifty-two".