66750030 has 24 divisors (see below), whose sum is σ = 173550312. Its totient is φ = 17799984.

The previous prime is 66750029. The next prime is 66750053. The reversal of 66750030 is 3005766.

It is a junction number, because it is equal to n+sod(n) for n = 66749976 and 66750003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 370744 + ... + 370923.

It is an arithmetic number, because the mean of its divisors is an integer number (7231263).

Almost surely, 2^66750030 is an apocalyptic number.

66750030 is an abundant number, since it is smaller than the sum of its proper divisors (106800282).

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

66750030 is a wasteful number, since it uses less digits than its factorization.

66750030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741680 (or 741677 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 66750030 is about 8170.0691551541. The cubic root of 66750030 is about 405.6490735180.

Adding to 66750030 its reverse (3005766), we get a palindrome (69755796).

The spelling of 66750030 in words is "sixty-six million, seven hundred fifty thousand, thirty".