665713155 has 8 divisors (see below), whose sum is σ = 1065141072. Its totient is φ = 355047008.

The previous prime is 665713151. The next prime is 665713159. The reversal of 665713155 is 551317566.

It is an interprime number because it is at equal distance from previous prime (665713151) and next prime (665713159).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 665713155 - 2² = 665713151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (665713151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22190424 + ... + 22190453.

It is an arithmetic number, because the mean of its divisors is an integer number (133142634).

Almost surely, 2^665713155 is an apocalyptic number.

665713155 is a deficient number, since it is larger than the sum of its proper divisors (399427917).

665713155 is a wasteful number, since it uses less digits than its factorization.

665713155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44380885.

The product of its digits is 94500, while the sum is 39.

The square root of 665713155 is about 25801.4176936075. The cubic root of 665713155 is about 873.1637814345.

The spelling of 665713155 in words is "six hundred sixty-five million, seven hundred thirteen thousand, one hundred fifty-five".