665152047401 has 4 divisors (see below), whose sum is σ = 665442890112. Its totient is φ = 664861204692.

The previous prime is 665152047397. The next prime is 665152047419. The reversal of 665152047401 is 104740251566.

665152047401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 665152047401 - 2² = 665152047397 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665152046401) 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, 145417925 + ... + 145422498.

It is an arithmetic number, because the mean of its divisors is an integer number (166360722528).

Almost surely, 2^665152047401 is an apocalyptic number.

It is an amenable number.

665152047401 is a deficient number, since it is larger than the sum of its proper divisors (290842711).

665152047401 is a wasteful number, since it uses less digits than its factorization.

665152047401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290842710.

The product of its (nonzero) digits is 201600, while the sum is 41.

Adding to 665152047401 its reverse (104740251566), we get a palindrome (769892298967).

The spelling of 665152047401 in words is "six hundred sixty-five billion, one hundred fifty-two million, forty-seven thousand, four hundred one".