106661777 has 2 divisors, whose sum is σ = 106661778. Its totient is φ = 106661776.

The previous prime is 106661743. The next prime is 106661803. The reversal of 106661777 is 777166601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102434641 + 4227136 = 10121^2 + 2056^2 .

It is a cyclic number.

It is not a de Polignac number, because 106661777 - 2¹⁴ = 106645393 is a prime.

It is a super-2 number, since 2×106661777² = 22753469345595458, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (106661707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53330888 + 53330889.

It is an arithmetic number, because the mean of its divisors is an integer number (53330889).

Almost surely, 2^106661777 is an apocalyptic number.

It is an amenable number.

106661777 is a deficient number, since it is larger than the sum of its proper divisors (1).

106661777 is an equidigital number, since it uses as much as digits as its factorization.

106661777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 74088, while the sum is 41.

The square root of 106661777 is about 10327.7188672039. The cubic root of 106661777 is about 474.2451938118.

The spelling of 106661777 in words is "one hundred six million, six hundred sixty-one thousand, seven hundred seventy-seven".