66642271570311 has 72 divisors (see below), whose sum is σ = 98221204561104. Its totient is φ = 40172717168640.

The previous prime is 66642271570309. The next prime is 66642271570361. The reversal of 66642271570311 is 11307517224666.

It is not a de Polignac number, because 66642271570311 - 2¹ = 66642271570309 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66642271570361) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 97447315 + ... + 98128811.

It is an arithmetic number, because the mean of its divisors is an integer number (1364183396682).

Almost surely, 2^{66642271570311} is an apocalyptic number.

66642271570311 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

66642271570311 is a deficient number, since it is larger than the sum of its proper divisors (31578932990793).

66642271570311 is a wasteful number, since it uses less digits than its factorization.

66642271570311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681681 (or 681621 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 51.

Adding to 66642271570311 its reverse (11307517224666), we get a palindrome (77949788794977).

The spelling of 66642271570311 in words is "sixty-six trillion, six hundred forty-two billion, two hundred seventy-one million, five hundred seventy thousand, three hundred eleven".