665923355 has 16 divisors (see below), whose sum is σ = 805823424. Its totient is φ = 528278400.

The previous prime is 665923339. The next prime is 665923361. The reversal of 665923355 is 553329566.

665923355 = T₂₈₉ + T₂₉₀ + ... + T₁₅₈₉.

It is not a de Polignac number, because 665923355 - 2⁴ = 665923339 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 511205 + ... + 512505.

It is an arithmetic number, because the mean of its divisors is an integer number (50363964).

Almost surely, 2^665923355 is an apocalyptic number.

665923355 is a deficient number, since it is larger than the sum of its proper divisors (139900069).

665923355 is a wasteful number, since it uses less digits than its factorization.

665923355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2086.

The product of its digits is 729000, while the sum is 44.

The square root of 665923355 is about 25805.4907916901. The cubic root of 665923355 is about 873.2556727199.

The spelling of 665923355 in words is "six hundred sixty-five million, nine hundred twenty-three thousand, three hundred fifty-five".