66854550 has 48 divisors (see below), whose sum is σ = 189487872. Its totient is φ = 15280800.

The previous prime is 66854549. The next prime is 66854573. The reversal of 66854550 is 5545866.

It is a junction number, because it is equal to n+sod(n) for n = 66854499 and 66854508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30786 + ... + 32885.

It is an arithmetic number, because the mean of its divisors is an integer number (3947664).

Almost surely, 2^66854550 is an apocalyptic number.

66854550 is an abundant number, since it is smaller than the sum of its proper divisors (122633322).

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

66854550 is a wasteful number, since it uses less digits than its factorization.

66854550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63693 (or 63688 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 39.

The square root of 66854550 is about 8176.4631718121. The cubic root of 66854550 is about 405.8606905547.

The spelling of 66854550 in words is "sixty-six million, eight hundred fifty-four thousand, five hundred fifty".