667884787870 has 16 divisors (see below), whose sum is σ = 1202666154480. Its totient is φ = 267048684864.

The previous prime is 667884787853. The next prime is 667884787873. The reversal of 667884787870 is 78787488766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667884787873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13127127 + ... + 13177906.

It is an arithmetic number, because the mean of its divisors is an integer number (75166634655).

Almost surely, 2^667884787870 is an apocalyptic number.

667884787870 is a deficient number, since it is larger than the sum of its proper divisors (534781366610).

667884787870 is a wasteful number, since it uses less digits than its factorization.

667884787870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26307579.

The product of its (nonzero) digits is 1416167424, while the sum is 76.

The spelling of 667884787870 in words is "six hundred sixty-seven billion, eight hundred eighty-four million, seven hundred eighty-seven thousand, eight hundred seventy".