660532135772053 has 4 divisors (see below), whose sum is σ = 660550441717728. Its totient is φ = 660513829826380.

The previous prime is 660532135771997. The next prime is 660532135772083. The reversal of 660532135772053 is 350277531235066.

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 660532135772053 - 2²¹ = 660532133674901 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 660532135771985 and 660532135772003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660532135772083) 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, 9152918713 + ... + 9152990878.

It is an arithmetic number, because the mean of its divisors is an integer number (165137610429432).

Almost surely, 2^{660532135772053} is an apocalyptic number.

It is an amenable number.

660532135772053 is a deficient number, since it is larger than the sum of its proper divisors (18305945675).

660532135772053 is a wasteful number, since it uses less digits than its factorization.

660532135772053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18305945674.

The product of its (nonzero) digits is 23814000, while the sum is 55.

The spelling of 660532135772053 in words is "six hundred sixty trillion, five hundred thirty-two billion, one hundred thirty-five million, seven hundred seventy-two thousand, fifty-three".