667247311262656 has 56 divisors (see below), whose sum is σ = 1339001374824000. Its totient is φ = 329861447798784.

The previous prime is 667247311262621. The next prime is 667247311262657. The reversal of 667247311262656 is 656262113742766.

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667247311262657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136170505 + ... + 140985463.

Almost surely, 2^{667247311262656} is an apocalyptic number.

It is an amenable number.

667247311262656 is an abundant number, since it is smaller than the sum of its proper divisors (671754063561344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

667247311262656 is a wasteful number, since it uses less digits than its factorization.

667247311262656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4839389 (or 4839379 counting only the distinct ones).

The product of its digits is 182891520, while the sum is 64.

The spelling of 667247311262656 in words is "six hundred sixty-seven trillion, two hundred forty-seven billion, three hundred eleven million, two hundred sixty-two thousand, six hundred fifty-six".