66052155 has 32 divisors (see below), whose sum is σ = 116250624. Its totient is φ = 31821696.

The previous prime is 66052153. The next prime is 66052163. The reversal of 66052155 is 55125066.

It is not a de Polignac number, because 66052155 - 2¹ = 66052153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66052153) 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 31 ways as a sum of consecutive naturals, for example, 5562 + ... + 12768.

It is an arithmetic number, because the mean of its divisors is an integer number (3632832).

Almost surely, 2^66052155 is an apocalyptic number.

66052155 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

66052155 is a deficient number, since it is larger than the sum of its proper divisors (50198469).

66052155 is a wasteful number, since it uses less digits than its factorization.

66052155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7275.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 66052155 is about 8127.2476891012. The cubic root of 66052155 is about 404.2304239706.

The spelling of 66052155 in words is "sixty-six million, fifty-two thousand, one hundred fifty-five".