66151255 has 16 divisors (see below), whose sum is σ = 83865600. Its totient is φ = 49952160.

The previous prime is 66151237. The next prime is 66151259. The reversal of 66151255 is 55215166.

66151255 = 493² + 494² + ... + 682².

It is not a de Polignac number, because 66151255 - 2⁵ = 66151223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66151259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28426 + ... + 30664.

It is an arithmetic number, because the mean of its divisors is an integer number (5241600).

Almost surely, 2^66151255 is an apocalyptic number.

66151255 is a deficient number, since it is larger than the sum of its proper divisors (17714345).

66151255 is a wasteful number, since it uses less digits than its factorization.

66151255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2574.

The product of its digits is 9000, while the sum is 31.

The square root of 66151255 is about 8133.3421789569. The cubic root of 66151255 is about 404.4324825695.

It can be divided in two parts, 66 and 151255, that added together give a square (151321 = 389²).

The spelling of 66151255 in words is "sixty-six million, one hundred fifty-one thousand, two hundred fifty-five".