66360401253 has 36 divisors (see below), whose sum is σ = 99801911040. Its totient is φ = 44121885192.

The previous prime is 66360401189. The next prime is 66360401273. The reversal of 66360401253 is 35210406366.

66360401253 is a `hidden beast` number, since 6 + 6 + 360 + 40 + 1 + 253 = 666.

It is not a de Polignac number, because 66360401253 - 2⁶ = 66360401189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66360401273) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2473276 + ... + 2499962.

Almost surely, 2^66360401253 is an apocalyptic number.

It is an amenable number.

66360401253 is a deficient number, since it is larger than the sum of its proper divisors (33441509787).

66360401253 is an frugal number, since it uses more digits than its factorization.

66360401253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27090 (or 27069 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The spelling of 66360401253 in words is "sixty-six billion, three hundred sixty million, four hundred one thousand, two hundred fifty-three".