66535811662 has 16 divisors (see below), whose sum is σ = 100786544352. Its totient is φ = 32940385920.

The previous prime is 66535811609. The next prime is 66535811663. The reversal of 66535811662 is 26611853566.

It is a super-2 number, since 2×66535811662² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66535811663) 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, 1869538 + ... + 1904794.

It is an arithmetic number, because the mean of its divisors is an integer number (6299159022).

Almost surely, 2^66535811662 is an apocalyptic number.

66535811662 is a deficient number, since it is larger than the sum of its proper divisors (34250732690).

66535811662 is a wasteful number, since it uses less digits than its factorization.

66535811662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44523.

The product of its digits is 1555200, while the sum is 49.

The spelling of 66535811662 in words is "sixty-six billion, five hundred thirty-five million, eight hundred eleven thousand, six hundred sixty-two".