725701166 has 4 divisors (see below), whose sum is σ = 1088551752. Its totient is φ = 362850582.

The previous prime is 725701159. The next prime is 725701169. The reversal of 725701166 is 661107527.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725701169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 181425290 + ... + 181425293.

It is an arithmetic number, because the mean of its divisors is an integer number (272137938).

Almost surely, 2^725701166 is an apocalyptic number.

725701166 is a deficient number, since it is larger than the sum of its proper divisors (362850586).

725701166 is a wasteful number, since it uses less digits than its factorization.

725701166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362850585.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 725701166 is about 26938.8412148704. The cubic root of 725701166 is about 898.6404022828.

The spelling of 725701166 in words is "seven hundred twenty-five million, seven hundred one thousand, one hundred sixty-six".