666130757 has 4 divisors (see below), whose sum is σ = 667676736. Its totient is φ = 664584780.

The previous prime is 666130739. The next prime is 666130763. The reversal of 666130757 is 757031666.

666130757 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 cyclic number.

It is not a de Polignac number, because 666130757 - 2¹⁰ = 666129733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666130357) 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, 772343 + ... + 773204.

It is an arithmetic number, because the mean of its divisors is an integer number (166919184).

Almost surely, 2^666130757 is an apocalyptic number.

It is an amenable number.

666130757 is a deficient number, since it is larger than the sum of its proper divisors (1545979).

666130757 is a wasteful number, since it uses less digits than its factorization.

666130757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1545978.

The product of its (nonzero) digits is 158760, while the sum is 41.

The square root of 666130757 is about 25809.5090422116. The cubic root of 666130757 is about 873.3463218775.

Subtracting 666130757 from its reverse (757031666), we obtain a palindrome (90900909).

The spelling of 666130757 in words is "six hundred sixty-six million, one hundred thirty thousand, seven hundred fifty-seven".