146565661 has 4 divisors (see below), whose sum is σ = 159889824. Its totient is φ = 133241500.

The previous prime is 146565659. The next prime is 146565667. The reversal of 146565661 is 166565641.

146565661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 146565661 - 2¹ = 146565659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146565667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6662065 + ... + 6662086.

It is an arithmetic number, because the mean of its divisors is an integer number (39972456).

Almost surely, 2^146565661 is an apocalyptic number.

146565661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

146565661 is a deficient number, since it is larger than the sum of its proper divisors (13324163).

146565661 is a wasteful number, since it uses less digits than its factorization.

146565661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13324162.

The product of its digits is 129600, while the sum is 40.

The square root of 146565661 is about 12106.4305639606. The cubic root of 146565661 is about 527.2429042973.

The spelling of 146565661 in words is "one hundred forty-six million, five hundred sixty-five thousand, six hundred sixty-one".