66025115 has 16 divisors (see below), whose sum is σ = 86116800. Its totient is φ = 48304512.

The previous prime is 66025097. The next prime is 66025117. The reversal of 66025115 is 51152066.

It is a cyclic number.

It is not a de Polignac number, because 66025115 - 2¹² = 66021019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66025117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2426 + ... + 11744.

It is an arithmetic number, because the mean of its divisors is an integer number (5382300).

Almost surely, 2^66025115 is an apocalyptic number.

66025115 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

66025115 is a deficient number, since it is larger than the sum of its proper divisors (20091685).

66025115 is a wasteful number, since it uses less digits than its factorization.

66025115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9446.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 66025115 is about 8125.5839790134. The cubic root of 66025115 is about 404.1752560379.

The spelling of 66025115 in words is "sixty-six million, twenty-five thousand, one hundred fifteen".