661701576067 has 8 divisors (see below), whose sum is σ = 756254944512. Its totient is φ = 567154350600.

The previous prime is 661701576059. The next prime is 661701576073. The reversal of 661701576067 is 760675107166.

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 661701576067 - 2³ = 661701576059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (661701576037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1302559 + ... + 1737832.

It is an arithmetic number, because the mean of its divisors is an integer number (94531868064).

Almost surely, 2^661701576067 is an apocalyptic number.

661701576067 is a deficient number, since it is larger than the sum of its proper divisors (94553368445).

661701576067 is a wasteful number, since it uses less digits than its factorization.

661701576067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3071489.

The product of its (nonzero) digits is 2222640, while the sum is 52.

The spelling of 661701576067 in words is "six hundred sixty-one billion, seven hundred one million, five hundred seventy-six thousand, sixty-seven".