66494160 has 60 divisors (see below), whose sum is σ = 223311972. Its totient is φ = 17731584.

The previous prime is 66494117. The next prime is 66494177. The reversal of 66494160 is 6149466.

66494160 is a `hidden beast` number, since 6 + 6 + 494 + 160 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 33039504 + 33454656 = 5748^2 + 5784^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45457 + ... + 46896.

Almost surely, 2^66494160 is an apocalyptic number.

66494160 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66494160 is an abundant number, since it is smaller than the sum of its proper divisors (156817812).

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

66494160 is a wasteful number, since it uses less digits than its factorization.

66494160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92372 (or 92363 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 66494160 is about 8154.3951339140. The cubic root of 66494160 is about 405.1300908105.

The spelling of 66494160 in words is "sixty-six million, four hundred ninety-four thousand, one hundred sixty".