667703718016 has 16 divisors (see below), whose sum is σ = 1330191000990. Its totient is φ = 333851858944.

The previous prime is 667703717983. The next prime is 667703718061. The reversal of 667703718016 is 610817307766.

It can be written as a sum of positive squares in only one way, i.e., 502250020416 + 165453697600 = 708696^2 + 406760^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2608217521 + ... + 2608217776.

Almost surely, 2^667703718016 is an apocalyptic number.

It is an amenable number.

667703718016 is a deficient number, since it is larger than the sum of its proper divisors (662487282974).

667703718016 is an equidigital number, since it uses as much as digits as its factorization.

667703718016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5216435311 (or 5216435299 counting only the distinct ones).

The product of its (nonzero) digits is 1778112, while the sum is 52.

The spelling of 667703718016 in words is "six hundred sixty-seven billion, seven hundred three million, seven hundred eighteen thousand, sixteen".