66851330 has 48 divisors (see below), whose sum is σ = 148941504. Its totient is φ = 21153600.

The previous prime is 66851311. The next prime is 66851377. The reversal of 66851330 is 3315866.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9005 + ... + 14655.

It is an arithmetic number, because the mean of its divisors is an integer number (3102948).

Almost surely, 2^66851330 is an apocalyptic number.

66851330 is an abundant number, since it is smaller than the sum of its proper divisors (82090174).

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

66851330 is a wasteful number, since it uses less digits than its factorization.

66851330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5691 (or 5678 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 66851330 is about 8176.2662627877. The cubic root of 66851330 is about 405.8541744567.

The spelling of 66851330 in words is "sixty-six million, eight hundred fifty-one thousand, three hundred thirty".