66355461238 has 16 divisors (see below), whose sum is σ = 108587245824. Its totient is φ = 30160022760.

The previous prime is 66355461217. The next prime is 66355461239. The reversal of 66355461238 is 83216455366.

It is a super-2 number, since 2×66355461238² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66355461191 and 66355461200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66355461239) 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, 435631 + ... + 567877.

It is an arithmetic number, because the mean of its divisors is an integer number (6786702864).

Almost surely, 2^66355461238 is an apocalyptic number.

66355461238 is a deficient number, since it is larger than the sum of its proper divisors (42231784586).

66355461238 is a wasteful number, since it uses less digits than its factorization.

66355461238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155067.

The product of its digits is 3110400, while the sum is 49.

The spelling of 66355461238 in words is "sixty-six billion, three hundred fifty-five million, four hundred sixty-one thousand, two hundred thirty-eight".