106661789 has 16 divisors (see below), whose sum is σ = 117552960. Its totient is φ = 96180480.

The previous prime is 106661777. The next prime is 106661803. The reversal of 106661789 is 987166601.

It is a cyclic number.

It is not a de Polignac number, because 106661789 - 2¹⁶ = 106596253 is a prime.

It is a super-2 number, since 2×106661789² = 22753474465361042, 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 (106661089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120629 + ... + 121509.

It is an arithmetic number, because the mean of its divisors is an integer number (7347060).

Almost surely, 2^106661789 is an apocalyptic number.

It is an amenable number.

106661789 is a deficient number, since it is larger than the sum of its proper divisors (10891171).

106661789 is a wasteful number, since it uses less digits than its factorization.

106661789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 106661789 is about 10327.7194481647. The cubic root of 106661789 is about 474.2452115969.

The spelling of 106661789 in words is "one hundred six million, six hundred sixty-one thousand, seven hundred eighty-nine".