66455000 has 40 divisors (see below), whose sum is σ = 155715780. Its totient is φ = 26580000.

The previous prime is 66454987. The next prime is 66455017. The reversal of 66455000 is 55466.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1646 + ... + 11645.

Almost surely, 2^66455000 is an apocalyptic number.

It is an amenable number.

66455000 is an abundant number, since it is smaller than the sum of its proper divisors (89260780).

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

66455000 is a wasteful number, since it uses less digits than its factorization.

66455000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13317 (or 13298 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 66455000 is about 8151.9936211948. The cubic root of 66455000 is about 405.0505449287.

The spelling of 66455000 in words is "sixty-six million, four hundred fifty-five thousand".