725656701766 has 4 divisors (see below), whose sum is σ = 1088485052652. Its totient is φ = 362828350882.

The previous prime is 725656701761. The next prime is 725656701769. The reversal of 725656701766 is 667107656527.

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

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 725656701766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725656701761) 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 as a sum of consecutive naturals, namely, 181414175440 + ... + 181414175443.

It is an arithmetic number, because the mean of its divisors is an integer number (272121263163).

Almost surely, 2^725656701766 is an apocalyptic number.

725656701766 is a deficient number, since it is larger than the sum of its proper divisors (362828350886).

725656701766 is a wasteful number, since it uses less digits than its factorization.

725656701766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362828350885.

The product of its (nonzero) digits is 22226400, while the sum is 58.

The spelling of 725656701766 in words is "seven hundred twenty-five billion, six hundred fifty-six million, seven hundred one thousand, seven hundred sixty-six".