665615107401 has 8 divisors (see below), whose sum is σ = 887759811744. Its totient is φ = 443606904000.

The previous prime is 665615107393. The next prime is 665615107427. The reversal of 665615107401 is 104701516566.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 665615107401 - 2³ = 665615107393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (665615107441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34113856 + ... + 34133361.

It is an arithmetic number, because the mean of its divisors is an integer number (110969976468).

Almost surely, 2^665615107401 is an apocalyptic number.

It is an amenable number.

665615107401 is a deficient number, since it is larger than the sum of its proper divisors (222144704343).

665615107401 is a wasteful number, since it uses less digits than its factorization.

665615107401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68250471.

The product of its (nonzero) digits is 151200, while the sum is 42.

The spelling of 665615107401 in words is "six hundred sixty-five billion, six hundred fifteen million, one hundred seven thousand, four hundred one".