1668956954 has 24 divisors (see below), whose sum is σ = 2961528480. Its totient is φ = 703141656.

The previous prime is 1668956953. The next prime is 1668956959. The reversal of 1668956954 is 4596598661.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is a junction number, because it is equal to n+sod(n) for n = 1668956893 and 1668956902.

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 11 ways as a sum of consecutive naturals, for example, 138542 + ... + 150105.

It is an arithmetic number, because the mean of its divisors is an integer number (123397020).

Almost surely, 2^1668956954 is an apocalyptic number.

1668956954 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1668956954 is a deficient number, since it is larger than the sum of its proper divisors (1292571526).

1668956954 is a wasteful number, since it uses less digits than its factorization.

1668956954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288722 (or 288715 counting only the distinct ones).

The product of its digits is 13996800, while the sum is 59.

The square root of 1668956954 is about 40852.8695932122. The cubic root of 1668956954 is about 1186.1739401000.

The spelling of 1668956954 in words is "one billion, six hundred sixty-eight million, nine hundred fifty-six thousand, nine hundred fifty-four".