66746850 has 24 divisors (see below), whose sum is σ = 165532560. Its totient is φ = 17799120.

The previous prime is 66746839. The next prime is 66746881. The reversal of 66746850 is 5864766.

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, 222340 + ... + 222639.

It is an arithmetic number, because the mean of its divisors is an integer number (6897190).

Almost surely, 2^66746850 is an apocalyptic number.

66746850 is an abundant number, since it is smaller than the sum of its proper divisors (98785710).

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

66746850 is a wasteful number, since it uses less digits than its factorization.

66746850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444994 (or 444989 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 66746850 is about 8169.8745400404. The cubic root of 66746850 is about 405.6426316506.

The spelling of 66746850 in words is "sixty-six million, seven hundred forty-six thousand, eight hundred fifty".