667060171557 has 32 divisors (see below), whose sum is σ = 1015107028992. Its totient is φ = 385995746304.

The previous prime is 667060171543. The next prime is 667060171559. The reversal of 667060171557 is 755171060766.

It is not a de Polignac number, because 667060171557 - 2⁴ = 667060171541 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667060171559) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 257883 + ... + 1183479.

It is an arithmetic number, because the mean of its divisors is an integer number (31722094656).

Almost surely, 2^667060171557 is an apocalyptic number.

It is an amenable number.

667060171557 is a deficient number, since it is larger than the sum of its proper divisors (348046857435).

667060171557 is a wasteful number, since it uses less digits than its factorization.

667060171557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926717.

The product of its (nonzero) digits is 1852200, while the sum is 51.

The spelling of 667060171557 in words is "six hundred sixty-seven billion, sixty million, one hundred seventy-one thousand, five hundred fifty-seven".