66891150 has 48 divisors (see below), whose sum is σ = 184326000. Its totient is φ = 17837280.

The previous prime is 66891137. The next prime is 66891151. The reversal of 66891150 is 5119866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66891151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23425 + ... + 26124.

It is an arithmetic number, because the mean of its divisors is an integer number (3840125).

Almost surely, 2^66891150 is an apocalyptic number.

66891150 is an abundant number, since it is smaller than the sum of its proper divisors (117434850).

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

66891150 is a wasteful number, since it uses less digits than its factorization.

66891150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49570 (or 49559 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 66891150 is about 8178.7009971022. The cubic root of 66891150 is about 405.9347408194.

The spelling of 66891150 in words is "sixty-six million, eight hundred ninety-one thousand, one hundred fifty".