66525155 has 8 divisors (see below), whose sum is σ = 81183600. Its totient is φ = 52317856.

The previous prime is 66525143. The next prime is 66525161. The reversal of 66525155 is 55152566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66525155 - 2⁶ = 66525091 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112460 + ... + 113049.

It is an arithmetic number, because the mean of its divisors is an integer number (10147950).

Almost surely, 2^66525155 is an apocalyptic number.

66525155 is a deficient number, since it is larger than the sum of its proper divisors (14658445).

66525155 is a wasteful number, since it uses less digits than its factorization.

66525155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225573.

The product of its digits is 45000, while the sum is 35.

The square root of 66525155 is about 8156.2954213295. The cubic root of 66525155 is about 405.1930289523.

The spelling of 66525155 in words is "sixty-six million, five hundred twenty-five thousand, one hundred fifty-five".