1665562968 has 24 divisors (see below), whose sum is σ = 4510899900. Its totient is φ = 555187632.

The previous prime is 1665562961. The next prime is 1665563057. The reversal of 1665562968 is 8692655661.

1665562968 is a `hidden beast` number, since 1 + 6 + 6 + 5 + 5 + 629 + 6 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665562961) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11566338 + ... + 11566481.

Almost surely, 2^1665562968 is an apocalyptic number.

1665562968 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1665562968 is an abundant number, since it is smaller than the sum of its proper divisors (2845336932).

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

1665562968 is a wasteful number, since it uses less digits than its factorization.

1665562968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23132831 (or 23132824 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 54.

The square root of 1665562968 is about 40811.3093149436. The cubic root of 1665562968 is about 1185.3693278112.

The spelling of 1665562968 in words is "one billion, six hundred sixty-five million, five hundred sixty-two thousand, nine hundred sixty-eight".