120618661 has 2 divisors, whose sum is σ = 120618662. Its totient is φ = 120618660.

The previous prime is 120618623. The next prime is 120618677. The reversal of 120618661 is 166816021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118156900 + 2461761 = 10870^2 + 1569^2 .

It is a cyclic number.

It is not a de Polignac number, because 120618661 - 2⁹ = 120618149 is a prime.

It is a super-2 number, since 2×120618661² = 29097722762865842, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120618461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60309330 + 60309331.

It is an arithmetic number, because the mean of its divisors is an integer number (60309331).

Almost surely, 2^120618661 is an apocalyptic number.

It is an amenable number.

120618661 is a deficient number, since it is larger than the sum of its proper divisors (1).

120618661 is an equidigital number, since it uses as much as digits as its factorization.

120618661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 120618661 is about 10982.6527305565. The cubic root of 120618661 is about 494.0886008150.

The spelling of 120618661 in words is "one hundred twenty million, six hundred eighteen thousand, six hundred sixty-one".