666725741 has 4 divisors (see below), whose sum is σ = 727337184. Its totient is φ = 606114300.

The previous prime is 666725729. The next prime is 666725749. The reversal of 666725741 is 147527666.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-666725741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 666725692 and 666725701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666725749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30305705 + ... + 30305726.

It is an arithmetic number, because the mean of its divisors is an integer number (181834296).

Almost surely, 2^666725741 is an apocalyptic number.

It is an amenable number.

666725741 is a deficient number, since it is larger than the sum of its proper divisors (60611443).

666725741 is a wasteful number, since it uses less digits than its factorization.

666725741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60611442.

The product of its digits is 423360, while the sum is 44.

The square root of 666725741 is about 25821.0329189210. The cubic root of 666725741 is about 873.6062670660.

The spelling of 666725741 in words is "six hundred sixty-six million, seven hundred twenty-five thousand, seven hundred forty-one".