666070207321677 has 4 divisors (see below), whose sum is σ = 888093609762240. Its totient is φ = 444046804881116.

The previous prime is 666070207321663. The next prime is 666070207321691. The reversal of 666070207321677 is 776123702070666.

666070207321677 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (666070207321663) and next prime (666070207321691).

It is a cyclic number.

It is not a de Polignac number, because 666070207321677 - 2¹⁵ = 666070207288909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 666070207321677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666070207328677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111011701220277 + ... + 111011701220282.

It is an arithmetic number, because the mean of its divisors is an integer number (222023402440560).

Almost surely, 2^{666070207321677} is an apocalyptic number.

It is an amenable number.

666070207321677 is a deficient number, since it is larger than the sum of its proper divisors (222023402440563).

666070207321677 is a wasteful number, since it uses less digits than its factorization.

666070207321677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222023402440562.

The product of its (nonzero) digits is 37340352, while the sum is 60.

The spelling of 666070207321677 in words is "six hundred sixty-six trillion, seventy billion, two hundred seven million, three hundred twenty-one thousand, six hundred seventy-seven".