101386666 has 4 divisors (see below), whose sum is σ = 152080002. Its totient is φ = 50693332.

The previous prime is 101386633. The next prime is 101386667. The reversal of 101386666 is 666683101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 63920025 + 37466641 = 7995^2 + 6121^2 .

It is not an unprimeable number, because it can be changed into a prime (101386667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25346665 + ... + 25346668.

Almost surely, 2^101386666 is an apocalyptic number.

101386666 is a deficient number, since it is larger than the sum of its proper divisors (50693336).

101386666 is an equidigital number, since it uses as much as digits as its factorization.

101386666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50693335.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 101386666 is about 10069.0945968344. The cubic root of 101386666 is about 466.2944868151.

The spelling of 101386666 in words is "one hundred one million, three hundred eighty-six thousand, six hundred sixty-six".