667648551141 has 72 divisors (see below), whose sum is σ = 1143326548728. Its totient is φ = 372932524800.

The previous prime is 667648551139. The next prime is 667648551197. The reversal of 667648551141 is 141155846766.

667648551141 is a `hidden beast` number, since 6 + 6 + 7 + 6 + 4 + 85 + 511 + 41 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5947648641 + 661700902500 = 77121^2 + 813450^2 .

It is not a de Polignac number, because 667648551141 - 2¹ = 667648551139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667648551131) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 9208411 + ... + 9280631.

It is an arithmetic number, because the mean of its divisors is an integer number (15879535399).

Almost surely, 2^667648551141 is an apocalyptic number.

It is an amenable number.

667648551141 is a deficient number, since it is larger than the sum of its proper divisors (475677997587).

667648551141 is a wasteful number, since it uses less digits than its factorization.

667648551141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72915 (or 72901 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 54.

The spelling of 667648551141 in words is "six hundred sixty-seven billion, six hundred forty-eight million, five hundred fifty-one thousand, one hundred forty-one".