665428077141 has 16 divisors (see below), whose sum is σ = 908928941760. Its totient is φ = 432774193280.

The previous prime is 665428077091. The next prime is 665428077151. The reversal of 665428077141 is 141770824566.

It is a cyclic number.

It is not a de Polignac number, because 665428077141 - 2⁶ = 665428077077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665428077151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2164990 + ... + 2453168.

It is an arithmetic number, because the mean of its divisors is an integer number (56808058860).

Almost surely, 2^665428077141 is an apocalyptic number.

It is an amenable number.

665428077141 is a deficient number, since it is larger than the sum of its proper divisors (243500864619).

665428077141 is a wasteful number, since it uses less digits than its factorization.

665428077141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306996.

The product of its (nonzero) digits is 2257920, while the sum is 51.

The spelling of 665428077141 in words is "six hundred sixty-five billion, four hundred twenty-eight million, seventy-seven thousand, one hundred forty-one".