661382119 has 2 divisors, whose sum is σ = 661382120. Its totient is φ = 661382118.

The previous prime is 661382083. The next prime is 661382129. The reversal of 661382119 is 911283166.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 661382119 - 2¹⁷ = 661251047 is a prime.

It is a super-2 number, since 2×661382119² = 874852614665860322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (661382129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330691059 + 330691060.

It is an arithmetic number, because the mean of its divisors is an integer number (330691060).

Almost surely, 2^661382119 is an apocalyptic number.

661382119 is a deficient number, since it is larger than the sum of its proper divisors (1).

661382119 is an equidigital number, since it uses as much as digits as its factorization.

661382119 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 37.

The square root of 661382119 is about 25717.3505439421. The cubic root of 661382119 is about 871.2660999325.

The spelling of 661382119 in words is "six hundred sixty-one million, three hundred eighty-two thousand, one hundred nineteen".