665068754 has 16 divisors (see below), whose sum is σ = 1140574848. Its totient is φ = 284915232.

The previous prime is 665068741. The next prime is 665068771. The reversal of 665068754 is 457860566.

It is a super-2 number, since 2×665068754² = 884632895094225032, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 665068699 and 665068708.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33299 + ... + 49385.

It is an arithmetic number, because the mean of its divisors is an integer number (71285928).

Almost surely, 2^665068754 is an apocalyptic number.

665068754 is a deficient number, since it is larger than the sum of its proper divisors (475506094).

665068754 is a wasteful number, since it uses less digits than its factorization.

665068754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19049.

The product of its (nonzero) digits is 1209600, while the sum is 47.

The square root of 665068754 is about 25788.9269648817. The cubic root of 665068754 is about 872.8819537139.

The spelling of 665068754 in words is "six hundred sixty-five million, sixty-eight thousand, seven hundred fifty-four".