66662087824966 has 4 divisors (see below), whose sum is σ = 99993131737452. Its totient is φ = 33331043912482.

The previous prime is 66662087824961. The next prime is 66662087824979. The reversal of 66662087824966 is 66942878026666.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 66662087824892 and 66662087824901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66662087824961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16665521956240 + ... + 16665521956243.

It is an arithmetic number, because the mean of its divisors is an integer number (24998282934363).

Almost surely, 2^{66662087824966} is an apocalyptic number.

66662087824966 is a deficient number, since it is larger than the sum of its proper divisors (33331043912486).

66662087824966 is a wasteful number, since it uses less digits than its factorization.

66662087824966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33331043912485.

The product of its (nonzero) digits is 3009871872, while the sum is 76.

The spelling of 66662087824966 in words is "sixty-six trillion, six hundred sixty-two billion, eighty-seven million, eight hundred twenty-four thousand, nine hundred sixty-six".