667377773766 has 48 divisors (see below), whose sum is σ = 1580890313808. Its totient is φ = 201793132800.

The previous prime is 667377773743. The next prime is 667377773771.

667377773766 is nontrivially palindromic in base 10.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 667377773694 and 667377773703.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3597255 + ... + 3778226.

It is an arithmetic number, because the mean of its divisors is an integer number (32935214871).

Almost surely, 2^667377773766 is an apocalyptic number.

667377773766 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

667377773766 is an abundant number, since it is smaller than the sum of its proper divisors (913512540042).

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

667377773766 is a wasteful number, since it uses less digits than its factorization.

667377773766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7375957 (or 7375954 counting only the distinct ones).

The product of its digits is 1372257936, while the sum is 72.

The spelling of 667377773766 in words is "six hundred sixty-seven billion, three hundred seventy-seven million, seven hundred seventy-three thousand, seven hundred sixty-six".