152568661 has 4 divisors (see below), whose sum is σ = 174364192. Its totient is φ = 130773132.

The previous prime is 152568643. The next prime is 152568673. The reversal of 152568661 is 166865251.

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 de Polignac number, because none of the positive numbers 2^k-152568661 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 (152568641) 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, 10897755 + ... + 10897768.

It is an arithmetic number, because the mean of its divisors is an integer number (43591048).

Almost surely, 2^152568661 is an apocalyptic number.

It is an amenable number.

152568661 is a deficient number, since it is larger than the sum of its proper divisors (21795531).

152568661 is an equidigital number, since it uses as much as digits as its factorization.

152568661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21795530.

The product of its digits is 86400, while the sum is 40.

The square root of 152568661 is about 12351.8687250149. The cubic root of 152568661 is about 534.3450348141.

The spelling of 152568661 in words is "one hundred fifty-two million, five hundred sixty-eight thousand, six hundred sixty-one".