661060379689 has 8 divisors (see below), whose sum is σ = 661639680000. Its totient is φ = 660481329552.

The previous prime is 661060379669. The next prime is 661060379741. The reversal of 661060379689 is 986973060166.

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 661060379689 - 2¹³ = 661060371497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (661060379669) 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, 5434072 + ... + 5554390.

It is an arithmetic number, because the mean of its divisors is an integer number (82704960000).

Almost surely, 2^661060379689 is an apocalyptic number.

It is an amenable number.

661060379689 is a deficient number, since it is larger than the sum of its proper divisors (579300311).

661060379689 is a wasteful number, since it uses less digits than its factorization.

661060379689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125087.

The product of its (nonzero) digits is 17635968, while the sum is 61.

The spelling of 661060379689 in words is "six hundred sixty-one billion, sixty million, three hundred seventy-nine thousand, six hundred eighty-nine".