666334101 has 4 divisors (see below), whose sum is σ = 888445472. Its totient is φ = 444222732.

The previous prime is 666334069. The next prime is 666334121. The reversal of 666334101 is 101433666.

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 666334101 - 2⁵ = 666334069 is a prime.

It is a super-2 number, since 2×666334101² = 888002268310956402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666334121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111055681 + ... + 111055686.

It is an arithmetic number, because the mean of its divisors is an integer number (222111368).

Almost surely, 2^666334101 is an apocalyptic number.

It is an amenable number.

666334101 is a deficient number, since it is larger than the sum of its proper divisors (222111371).

666334101 is a wasteful number, since it uses less digits than its factorization.

666334101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222111370.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 666334101 is about 25813.4480649138. The cubic root of 666334101 is about 873.4351791403.

Adding to 666334101 its reverse (101433666), we get a palindrome (767767767).

It can be divided in two parts, 666334 and 101, that added together give a triangular number (666435 = T₁₁₅₄).

The spelling of 666334101 in words is "six hundred sixty-six million, three hundred thirty-four thousand, one hundred one".