667744076770 has 16 divisors (see below), whose sum is σ = 1234424185848. Its totient is φ = 259878775680.

The previous prime is 667744076759. The next prime is 667744076789. The reversal of 667744076770 is 77670447766.

It can be written as a sum of positive squares in 4 ways, for example, as 452790372609 + 214953704161 = 672897^2 + 463631^2 .

It is a super-2 number, since 2×667744076770² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 667744076699 and 667744076708.

It is an unprimeable number.

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, 902356491 + ... + 902357230.

Almost surely, 2^667744076770 is an apocalyptic number.

667744076770 is a deficient number, since it is larger than the sum of its proper divisors (566680109078).

667744076770 is a wasteful number, since it uses less digits than its factorization.

667744076770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1804713765.

The product of its (nonzero) digits is 58084992, while the sum is 61.

The spelling of 667744076770 in words is "six hundred sixty-seven billion, seven hundred forty-four million, seventy-six thousand, seven hundred seventy".