667233087557 has 16 divisors (see below), whose sum is σ = 690450443760. Its totient is φ = 644518425600.

The previous prime is 667233087551. The next prime is 667233087559. The reversal of 667233087557 is 755780332766.

It can be written as a sum of positive squares in 8 ways, for example, as 277596211876 + 389636875681 = 526874^2 + 624209^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667233087557 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 667233087496 and 667233087505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667233087551) 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, 307307 + ... + 1195367.

It is an arithmetic number, because the mean of its divisors is an integer number (43153152735).

Almost surely, 2^667233087557 is an apocalyptic number.

It is an amenable number.

667233087557 is a deficient number, since it is larger than the sum of its proper divisors (23217356203).

667233087557 is a wasteful number, since it uses less digits than its factorization.

667233087557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888344.

The product of its (nonzero) digits is 44452800, while the sum is 59.

The spelling of 667233087557 in words is "six hundred sixty-seven billion, two hundred thirty-three million, eighty-seven thousand, five hundred fifty-seven".