667441612377 has 24 divisors (see below), whose sum is σ = 1003679007240. Its totient is φ = 426881145600.

The previous prime is 667441612373. The next prime is 667441612379. The reversal of 667441612377 is 773216144766.

It is a happy number.

667441612377 is a `hidden beast` number, since 6 + 6 + 7 + 441 + 6 + 123 + 77 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 41070670281 + 626370942096 = 202659^2 + 791436^2 .

It is not a de Polignac number, because 667441612377 - 2² = 667441612373 is a prime.

It is not an unprimeable number, because it can be changed into a prime (667441612373) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8103124 + ... + 8185077.

It is an arithmetic number, because the mean of its divisors is an integer number (41819958635).

Almost surely, 2^667441612377 is an apocalyptic number.

It is an amenable number.

667441612377 is a deficient number, since it is larger than the sum of its proper divisors (336237394863).

667441612377 is a wasteful number, since it uses less digits than its factorization.

667441612377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16288393 (or 16288390 counting only the distinct ones).

The product of its digits is 7112448, while the sum is 54.

The spelling of 667441612377 in words is "six hundred sixty-seven billion, four hundred forty-one million, six hundred twelve thousand, three hundred seventy-seven".