146563661 has 4 divisors (see below), whose sum is σ = 146596032. Its totient is φ = 146531292.

The previous prime is 146563657. The next prime is 146563673. The reversal of 146563661 is 166365641.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 166365641 = 13 ⋅12797357.

It is a cyclic number.

It is not a de Polignac number, because 146563661 - 2² = 146563657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146563601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8021 + ... + 18906.

It is an arithmetic number, because the mean of its divisors is an integer number (36649008).

Almost surely, 2^146563661 is an apocalyptic number.

It is an amenable number.

146563661 is a deficient number, since it is larger than the sum of its proper divisors (32371).

146563661 is an equidigital number, since it uses as much as digits as its factorization.

146563661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32370.

The product of its digits is 77760, while the sum is 38.

The square root of 146563661 is about 12106.3479629490. The cubic root of 146563661 is about 527.2405060761.

The spelling of 146563661 in words is "one hundred forty-six million, five hundred sixty-three thousand, six hundred sixty-one".