66350655 has 36 divisors (see below), whose sum is σ = 133789032. Its totient is φ = 30330720.

The previous prime is 66350639. The next prime is 66350659. The reversal of 66350655 is 55605366.

It is a happy number.

It is not a de Polignac number, because 66350655 - 2⁴ = 66350639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66350659) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 12841 + ... + 17250.

It is an arithmetic number, because the mean of its divisors is an integer number (3716362).

Almost surely, 2^66350655 is an apocalyptic number.

66350655 is an abundant number, since it is smaller than the sum of its proper divisors (67438377).

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

66350655 is a wasteful number, since it uses less digits than its factorization.

66350655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30116 (or 30106 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 36.

The square root of 66350655 is about 8145.5911387695. The cubic root of 66350655 is about 404.8384357854.

The spelling of 66350655 in words is "sixty-six million, three hundred fifty thousand, six hundred fifty-five".