66629349661 has 8 divisors (see below), whose sum is σ = 76154640320. Its totient is φ = 57105762048.

The previous prime is 66629349617. The next prime is 66629349697. The reversal of 66629349661 is 16694392666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66629349661 - 2²³ = 66620961053 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66629349596 and 66629349605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66629349961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 340791 + ... + 499396.

It is an arithmetic number, because the mean of its divisors is an integer number (9519330040).

Almost surely, 2^66629349661 is an apocalyptic number.

It is an amenable number.

66629349661 is a deficient number, since it is larger than the sum of its proper divisors (9525290659).

66629349661 is a wasteful number, since it uses less digits than its factorization.

66629349661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851523.

The product of its digits is 15116544, while the sum is 58.

The spelling of 66629349661 in words is "sixty-six billion, six hundred twenty-nine million, three hundred forty-nine thousand, six hundred sixty-one".