666730101 has 4 divisors (see below), whose sum is σ = 888973472. Its totient is φ = 444486732.

The previous prime is 666730037. The next prime is 666730117. The reversal of 666730101 is 101037666.

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 not a de Polignac number, because 666730101 - 2⁶ = 666730037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666730901) 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, 111121681 + ... + 111121686.

It is an arithmetic number, because the mean of its divisors is an integer number (222243368).

Almost surely, 2^666730101 is an apocalyptic number.

It is an amenable number.

666730101 is a deficient number, since it is larger than the sum of its proper divisors (222243371).

666730101 is a wasteful number, since it uses less digits than its factorization.

666730101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222243370.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 666730101 is about 25821.1173460794. The cubic root of 666730101 is about 873.6081713547.

Adding to 666730101 its reverse (101037666), we get a palindrome (767767767).

The spelling of 666730101 in words is "six hundred sixty-six million, seven hundred thirty thousand, one hundred one".