66751450 has 24 divisors (see below), whose sum is σ = 124456320. Its totient is φ = 26636400.

The previous prime is 66751429. The next prime is 66751481. The reversal of 66751450 is 5415766.

It is a happy number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 23191 + ... + 25909.

It is an arithmetic number, because the mean of its divisors is an integer number (5185680).

Almost surely, 2^66751450 is an apocalyptic number.

66751450 is a deficient number, since it is larger than the sum of its proper divisors (57704870).

66751450 is a wasteful number, since it uses less digits than its factorization.

66751450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3222 (or 3217 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 66751450 is about 8170.1560572611. The cubic root of 66751450 is about 405.6519500091.

The spelling of 66751450 in words is "sixty-six million, seven hundred fifty-one thousand, four hundred fifty".