66742160 has 20 divisors (see below), whose sum is σ = 155175708. Its totient is φ = 26696832.

The previous prime is 66742141. The next prime is 66742199. The reversal of 66742160 is 6124766.

It can be written as a sum of positive squares in 2 ways, for example, as 49336576 + 17405584 = 7024^2 + 4172^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 417059 + ... + 417218.

Almost surely, 2^66742160 is an apocalyptic number.

It is an amenable number.

66742160 is an abundant number, since it is smaller than the sum of its proper divisors (88433548).

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

66742160 is a wasteful number, since it uses less digits than its factorization.

66742160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834290 (or 834284 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 66742160 is about 8169.5875048866. The cubic root of 66742160 is about 405.6331305355.

The spelling of 66742160 in words is "sixty-six million, seven hundred forty-two thousand, one hundred sixty".