667087780696 has 32 divisors (see below), whose sum is σ = 1381946559840. Its totient is φ = 300274805248.

The previous prime is 667087780663. The next prime is 667087780699. The reversal of 667087780696 is 696087780766.

It is a super-2 number, since 2×667087780696² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667087780699) 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, 106628551 + ... + 106634806.

It is an arithmetic number, because the mean of its divisors is an integer number (43185829995).

Almost surely, 2^667087780696 is an apocalyptic number.

It is an amenable number.

667087780696 is an abundant number, since it is smaller than the sum of its proper divisors (714858779144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

667087780696 is a wasteful number, since it uses less digits than its factorization.

667087780696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213263403 (or 213263399 counting only the distinct ones).

The product of its (nonzero) digits is 256048128, while the sum is 70.

Adding to 667087780696 its sum of digits (70), we get a palindrome (667087780766).

The spelling of 667087780696 in words is "six hundred sixty-seven billion, eighty-seven million, seven hundred eighty thousand, six hundred ninety-six".