665346755 has 16 divisors (see below), whose sum is σ = 805675680. Its totient is φ = 527459328.

The previous prime is 665346743. The next prime is 665346763. The reversal of 665346755 is 557643566.

It is a cyclic number.

It is not a de Polignac number, because 665346755 - 2¹⁴ = 665330371 is a prime.

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, 304256 + ... + 306434.

It is an arithmetic number, because the mean of its divisors is an integer number (50354730).

Almost surely, 2^665346755 is an apocalyptic number.

665346755 is a deficient number, since it is larger than the sum of its proper divisors (140328925).

665346755 is a wasteful number, since it uses less digits than its factorization.

665346755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2710.

The product of its digits is 2268000, while the sum is 47.

The square root of 665346755 is about 25794.3163313161. The cubic root of 665346755 is about 873.0035593129.

The spelling of 665346755 in words is "six hundred sixty-five million, three hundred forty-six thousand, seven hundred fifty-five".