66845950 has 12 divisors (see below), whose sum is σ = 124333560. Its totient is φ = 26738360.

The previous prime is 66845903. The next prime is 66845953. The reversal of 66845950 is 5954866.

It is a junction number, because it is equal to n+sod(n) for n = 66845897 and 66845906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66845953) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 668410 + ... + 668509.

It is an arithmetic number, because the mean of its divisors is an integer number (10361130).

Almost surely, 2^66845950 is an apocalyptic number.

66845950 is a deficient number, since it is larger than the sum of its proper divisors (57487610).

66845950 is a wasteful number, since it uses less digits than its factorization.

66845950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336931 (or 1336926 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 43.

The square root of 66845950 is about 8175.9372551408. The cubic root of 66845950 is about 405.8432868446.

The spelling of 66845950 in words is "sixty-six million, eight hundred forty-five thousand, nine hundred fifty".