726669851 has 4 divisors (see below), whose sum is σ = 733864704. Its totient is φ = 719475000.

The previous prime is 726669829. The next prime is 726669859. The reversal of 726669851 is 158966627.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 158966627 = 101 ⋅1573927.

It is a cyclic number.

It is not a de Polignac number, because 726669851 - 2²² = 722475547 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 726669851.

It is not an unprimeable number, because it can be changed into a prime (726669859) 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 in 3 ways as a sum of consecutive naturals, for example, 3597275 + ... + 3597476.

It is an arithmetic number, because the mean of its divisors is an integer number (183466176).

Almost surely, 2^726669851 is an apocalyptic number.

726669851 is a deficient number, since it is larger than the sum of its proper divisors (7194853).

726669851 is a wasteful number, since it uses less digits than its factorization.

726669851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7194852.

The product of its digits is 1088640, while the sum is 50.

The square root of 726669851 is about 26956.8145558781. The cubic root of 726669851 is about 899.0400674544.

The spelling of 726669851 in words is "seven hundred twenty-six million, six hundred sixty-nine thousand, eight hundred fifty-one".