119778661 has 2 divisors, whose sum is σ = 119778662. Its totient is φ = 119778660.

The previous prime is 119778649. The next prime is 119778667. The reversal of 119778661 is 166877911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80013025 + 39765636 = 8945^2 + 6306^2 .

It is a cyclic number.

It is not a de Polignac number, because 119778661 - 2⁵ = 119778629 is a prime.

It is equal to p_6829687 and since 119778661 and 6829687 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (119778667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59889330 + 59889331.

It is an arithmetic number, because the mean of its divisors is an integer number (59889331).

Almost surely, 2^119778661 is an apocalyptic number.

It is an amenable number.

119778661 is a deficient number, since it is larger than the sum of its proper divisors (1).

119778661 is an equidigital number, since it uses as much as digits as its factorization.

119778661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 46.

The square root of 119778661 is about 10944.3437902873. The cubic root of 119778661 is about 492.9389677130.

The spelling of 119778661 in words is "one hundred nineteen million, seven hundred seventy-eight thousand, six hundred sixty-one".