667242242766 has 32 divisors (see below), whose sum is σ = 1617556953600. Its totient is φ = 202194618840.

The previous prime is 667242242759. The next prime is 667242242767.

667242242766 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667242242767) 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, 561651126 + ... + 561652313.

It is an arithmetic number, because the mean of its divisors is an integer number (50548654800).

Almost surely, 2^667242242766 is an apocalyptic number.

667242242766 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

667242242766 is an abundant number, since it is smaller than the sum of its proper divisors (950314710834).

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

667242242766 is a wasteful number, since it uses less digits than its factorization.

667242242766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1123303461 (or 1123303455 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 54.

The spelling of 667242242766 in words is "six hundred sixty-seven billion, two hundred forty-two million, two hundred forty-two thousand, seven hundred sixty-six".