66145708 has 24 divisors (see below), whose sum is σ = 123790464. Its totient is φ = 30816000.

The previous prime is 66145697. The next prime is 66145711. The reversal of 66145708 is 80754166.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2053 + ... + 11683.

It is an arithmetic number, because the mean of its divisors is an integer number (5157936).

Almost surely, 2^66145708 is an apocalyptic number.

66145708 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

66145708 is a deficient number, since it is larger than the sum of its proper divisors (57644756).

66145708 is a wasteful number, since it uses less digits than its factorization.

66145708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9753 (or 9751 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 66145708 is about 8133.0011680806. The cubic root of 66145708 is about 404.4211779229.

The spelling of 66145708 in words is "sixty-six million, one hundred forty-five thousand, seven hundred eight".