666465054154241 has 4 divisors (see below), whose sum is σ = 695441795639232. Its totient is φ = 637488312669252.

The previous prime is 666465054154223. The next prime is 666465054154247. The reversal of 666465054154241 is 142451450564666.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 666465054154241 - 2²² = 666465049959937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666465054154247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14488370742461 + ... + 14488370742506.

It is an arithmetic number, because the mean of its divisors is an integer number (173860448909808).

Almost surely, 2^{666465054154241} is an apocalyptic number.

It is an amenable number.

666465054154241 is a deficient number, since it is larger than the sum of its proper divisors (28976741484991).

666465054154241 is a wasteful number, since it uses less digits than its factorization.

666465054154241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28976741484990.

The product of its (nonzero) digits is 82944000, while the sum is 59.

The spelling of 666465054154241 in words is "six hundred sixty-six trillion, four hundred sixty-five billion, fifty-four million, one hundred fifty-four thousand, two hundred forty-one".