66361758 has 16 divisors (see below), whose sum is σ = 134705280. Its totient is φ = 21790296.

The previous prime is 66361753. The next prime is 66361759. The reversal of 66361758 is 85716366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66361753) 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, 82138 + ... + 82941.

It is an arithmetic number, because the mean of its divisors is an integer number (8419080).

Almost surely, 2^66361758 is an apocalyptic number.

66361758 is an abundant number, since it is smaller than the sum of its proper divisors (68343522).

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

66361758 is a wasteful number, since it uses less digits than its factorization.

66361758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165151.

The product of its digits is 181440, while the sum is 42.

The square root of 66361758 is about 8146.2726445903. The cubic root of 66361758 is about 404.8610161726.

The spelling of 66361758 in words is "sixty-six million, three hundred sixty-one thousand, seven hundred fifty-eight".