101066665601 has 4 divisors (see below), whose sum is σ = 110254544304. Its totient is φ = 91878786900.

The previous prime is 101066665597. The next prime is 101066665627. The reversal of 101066665601 is 106566660101.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 106566660101 = 11 ⋅9687878191.

It is a cyclic number.

It is not a de Polignac number, because 101066665601 - 2² = 101066665597 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101066665691) 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, 4593939335 + ... + 4593939356.

It is an arithmetic number, because the mean of its divisors is an integer number (27563636076).

Almost surely, 2^101066665601 is an apocalyptic number.

101066665601 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

101066665601 is a deficient number, since it is larger than the sum of its proper divisors (9187878703).

101066665601 is an equidigital number, since it uses as much as digits as its factorization.

101066665601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9187878702.

The product of its (nonzero) digits is 38880, while the sum is 38.

It can be divided in two parts, 101066 and 665601, that added together give a palindrome (766667).

The spelling of 101066665601 in words is "one hundred one billion, sixty-six million, six hundred sixty-five thousand, six hundred one".