146688665 has 16 divisors (see below), whose sum is σ = 186749712. Its totient is φ = 110229504.

The previous prime is 146688653. The next prime is 146688673. The reversal of 146688665 is 566886641.

146688665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 1630729 + 145057936 = 1277^2 + 12044^2 .

It is a cyclic number.

It is not a de Polignac number, because 146688665 - 2¹⁰ = 146687641 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51047 + ... + 53843.

It is an arithmetic number, because the mean of its divisors is an integer number (11671857).

Almost surely, 2^146688665 is an apocalyptic number.

It is an amenable number.

146688665 is a deficient number, since it is larger than the sum of its proper divisors (40061047).

146688665 is a wasteful number, since it uses less digits than its factorization.

146688665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3436.

The product of its digits is 1658880, while the sum is 50.

The square root of 146688665 is about 12111.5096086326. The cubic root of 146688665 is about 527.3903577816.

The spelling of 146688665 in words is "one hundred forty-six million, six hundred eighty-eight thousand, six hundred sixty-five".