101661801 has 4 divisors (see below), whose sum is σ = 135549072. Its totient is φ = 67774532.

The previous prime is 101661787. The next prime is 101661827. The reversal of 101661801 is 108166101.

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: 108166101 = 3 ⋅36055367.

It is a cyclic number.

It is not a de Polignac number, because 101661801 - 2⁹ = 101661289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (101661871) 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, 16943631 + ... + 16943636.

It is an arithmetic number, because the mean of its divisors is an integer number (33887268).

Almost surely, 2^101661801 is an apocalyptic number.

It is an amenable number.

101661801 is a deficient number, since it is larger than the sum of its proper divisors (33887271).

101661801 is an equidigital number, since it uses as much as digits as its factorization.

101661801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33887270.

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 101661801 is about 10082.7476909819. The cubic root of 101661801 is about 466.7159033651.

The spelling of 101661801 in words is "one hundred one million, six hundred sixty-one thousand, eight hundred one".