667666733775 has 24 divisors (see below), whose sum is σ = 1151870263680. Its totient is φ = 340606796640.

The previous prime is 667666733711. The next prime is 667666733807. The reversal of 667666733775 is 577337666766.

It is not a de Polignac number, because 667666733775 - 2⁶ = 667666733711 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 193524865 + ... + 193528314.

It is an arithmetic number, because the mean of its divisors is an integer number (47994594320).

Almost surely, 2^667666733775 is an apocalyptic number.

667666733775 is a deficient number, since it is larger than the sum of its proper divisors (484203529905).

667666733775 is a wasteful number, since it uses less digits than its factorization.

667666733775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387053215 (or 387053210 counting only the distinct ones).

The product of its digits is 840157920, while the sum is 69.

The spelling of 667666733775 in words is "six hundred sixty-seven billion, six hundred sixty-six million, seven hundred thirty-three thousand, seven hundred seventy-five".