667231077887 has 16 divisors (see below), whose sum is σ = 755648887680. Its totient is φ = 583587832800.

The previous prime is 667231077883. The next prime is 667231077893. The reversal of 667231077887 is 788770132766.

It is a cyclic number.

It is not a de Polignac number, because 667231077887 - 2² = 667231077883 is a prime.

It is a super-2 number, since 2×667231077887² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667231077883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3605189 + ... + 3785742.

It is an arithmetic number, because the mean of its divisors is an integer number (47228055480).

Almost surely, 2^667231077887 is an apocalyptic number.

667231077887 is a deficient number, since it is larger than the sum of its proper divisors (88417809793).

667231077887 is a wasteful number, since it uses less digits than its factorization.

667231077887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7391254.

The product of its (nonzero) digits is 33191424, while the sum is 62.

The spelling of 667231077887 in words is "six hundred sixty-seven billion, two hundred thirty-one million, seventy-seven thousand, eight hundred eighty-seven".