66854610 has 48 divisors (see below), whose sum is σ = 176432256. Its totient is φ = 17560224.

The previous prime is 66854581. The next prime is 66854651. The reversal of 66854610 is 1645866.

It is a Curzon 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, 487 + ... + 11573.

It is an arithmetic number, because the mean of its divisors is an integer number (3675672).

Almost surely, 2^66854610 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66854610, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88216128).

66854610 is an abundant number, since it is smaller than the sum of its proper divisors (109577646).

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

66854610 is a wasteful number, since it uses less digits than its factorization.

66854610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11167 (or 11164 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 66854610 is about 8176.4668408794. The cubic root of 66854610 is about 405.8608119707.

It can be divided in two parts, 668 and 54610, that added together give a triangular number (55278 = T₃₃₂).

The spelling of 66854610 in words is "sixty-six million, eight hundred fifty-four thousand, six hundred ten".