66040758 has 40 divisors (see below), whose sum is σ = 169123152. Its totient is φ = 18868464.

The previous prime is 66040747. The next prime is 66040763. The reversal of 66040758 is 85704066.

It is a happy number.

It is a super-2 number, since 2×66040758² = 8722763434429128, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 27985 + ... + 30252.

Almost surely, 2^66040758 is an apocalyptic number.

66040758 is an abundant number, since it is smaller than the sum of its proper divisors (103082394).

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

66040758 is a wasteful number, since it uses less digits than its factorization.

66040758 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58258 (or 58249 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 66040758 is about 8126.5464989748. The cubic root of 66040758 is about 404.2071732574.

The spelling of 66040758 in words is "sixty-six million, forty thousand, seven hundred fifty-eight".