665294659055 has 16 divisors (see below), whose sum is σ = 860739166560. Its totient is φ = 490738082688.

The previous prime is 665294659037. The next prime is 665294659061. The reversal of 665294659055 is 550956492566.

It is a cyclic number.

It is not a de Polignac number, because 665294659055 - 2²⁴ = 665277881839 is a prime.

It is a congruent number.

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, 5738360 + ... + 5853149.

It is an arithmetic number, because the mean of its divisors is an integer number (53796197910).

Almost surely, 2^665294659055 is an apocalyptic number.

665294659055 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

665294659055 is a deficient number, since it is larger than the sum of its proper divisors (195444507505).

665294659055 is a wasteful number, since it uses less digits than its factorization.

665294659055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11592410.

The product of its (nonzero) digits is 87480000, while the sum is 62.

The spelling of 665294659055 in words is "six hundred sixty-five billion, two hundred ninety-four million, six hundred fifty-nine thousand, fifty-five".