66782750 has 16 divisors (see below), whose sum is σ = 125017776. Its totient is φ = 26713000.

The previous prime is 66782699. The next prime is 66782753. The reversal of 66782750 is 5728766.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66782698 and 66782707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66782753) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133316 + ... + 133815.

It is an arithmetic number, because the mean of its divisors is an integer number (7813611).

Almost surely, 2^66782750 is an apocalyptic number.

66782750 is a deficient number, since it is larger than the sum of its proper divisors (58235026).

66782750 is a wasteful number, since it uses less digits than its factorization.

66782750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267148 (or 267138 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 41.

The square root of 66782750 is about 8172.0713408536. The cubic root of 66782750 is about 405.7153439979.

The spelling of 66782750 in words is "sixty-six million, seven hundred eighty-two thousand, seven hundred fifty".