66854000 has 40 divisors (see below), whose sum is σ = 161657808. Its totient is φ = 26740800.

The previous prime is 66853999. The next prime is 66854003. The reversal of 66854000 is 45866.

It is a tau number, because it is divible by the number of its divisors (40).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66854003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14714 + ... + 18713.

Almost surely, 2^66854000 is an apocalyptic number.

It is an amenable number.

66854000 is an abundant number, since it is smaller than the sum of its proper divisors (94803808).

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

66854000 is a wasteful number, since it uses less digits than its factorization.

66854000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33450 (or 33434 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 66854000 is about 8176.4295386189. The cubic root of 66854000 is about 405.8595775714.

Adding to 66854000 its reverse (45866), we get a palindrome (66899866).

The spelling of 66854000 in words is "sixty-six million, eight hundred fifty-four thousand".