133025336365661 has 4 divisors (see below), whose sum is σ = 133026211045824. Its totient is φ = 133024461685500.

The previous prime is 133025336365643. The next prime is 133025336365681. The reversal of 133025336365661 is 166563633520331.

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 a de Polignac number, because none of the positive numbers 2^k-133025336365661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133025336365681) 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, 437111915 + ... + 437416136.

It is an arithmetic number, because the mean of its divisors is an integer number (33256552761456).

Almost surely, 2^{133025336365661} is an apocalyptic number.

It is an amenable number.

133025336365661 is a deficient number, since it is larger than the sum of its proper divisors (874680163).

133025336365661 is an equidigital number, since it uses as much as digits as its factorization.

133025336365661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874680162.

The product of its (nonzero) digits is 15746400, while the sum is 53.

Adding to 133025336365661 its reverse (166563633520331), we get a palindrome (299588969885992).

The spelling of 133025336365661 in words is "one hundred thirty-three trillion, twenty-five billion, three hundred thirty-six million, three hundred sixty-five thousand, six hundred sixty-one".