66364155 has 48 divisors (see below), whose sum is σ = 135154656. Its totient is φ = 29698560.

The previous prime is 66364147. The next prime is 66364159. The reversal of 66364155 is 55146366.

66364155 is a `hidden beast` number, since 6 + 6 + 3 + 641 + 5 + 5 = 666.

It is not a de Polignac number, because 66364155 - 2³ = 66364147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66364159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1279 + ... + 11591.

It is an arithmetic number, because the mean of its divisors is an integer number (2815722).

Almost surely, 2^66364155 is an apocalyptic number.

66364155 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

66364155 is an abundant number, since it is smaller than the sum of its proper divisors (68790501).

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

66364155 is a wasteful number, since it uses less digits than its factorization.

66364155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10348 (or 10345 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 66364155 is about 8146.4197657621. The cubic root of 66364155 is about 404.8658906676.

The spelling of 66364155 in words is "sixty-six million, three hundred sixty-four thousand, one hundred fifty-five".