146661553 has 2 divisors, whose sum is σ = 146661554. Its totient is φ = 146661552.

The previous prime is 146661539. The next prime is 146661563. The reversal of 146661553 is 355166641.

146661553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140351409 + 6310144 = 11847^2 + 2512^2 .

It is a cyclic number.

It is not a de Polignac number, because 146661553 - 2⁵ = 146661521 is a prime.

It is a super-2 number, since 2×146661553² = 43019222256743618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (146661503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73330776 + 73330777.

It is an arithmetic number, because the mean of its divisors is an integer number (73330777).

Almost surely, 2^146661553 is an apocalyptic number.

It is an amenable number.

146661553 is a deficient number, since it is larger than the sum of its proper divisors (1).

146661553 is an equidigital number, since it uses as much as digits as its factorization.

146661553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 37.

The square root of 146661553 is about 12110.3902909857. The cubic root of 146661553 is about 527.3578638181.

The spelling of 146661553 in words is "one hundred forty-six million, six hundred sixty-one thousand, five hundred fifty-three".