666021610466132 has 24 divisors (see below), whose sum is σ = 1179591599669952. Its totient is φ = 328995515030400.

The previous prime is 666021610466131. The next prime is 666021610466141. The reversal of 666021610466132 is 231664016120666.

It is a super-4 number, since 4×666021610466132⁴ (a number of 60 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666021610466131) 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, 25864457 + ... + 44732687.

It is an arithmetic number, because the mean of its divisors is an integer number (49149649986248).

Almost surely, 2^{666021610466132} is an apocalyptic number.

It is an amenable number.

666021610466132 is a deficient number, since it is larger than the sum of its proper divisors (513569989203820).

666021610466132 is a wasteful number, since it uses less digits than its factorization.

666021610466132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18974639 (or 18974637 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 50.

Adding to 666021610466132 its reverse (231664016120666), we get a palindrome (897685626586798).

The spelling of 666021610466132 in words is "six hundred sixty-six trillion, twenty-one billion, six hundred ten million, four hundred sixty-six thousand, one hundred thirty-two".