667020766 has 8 divisors (see below), whose sum is σ = 1010437704. Its totient is φ = 330208200.

The previous prime is 667020751. The next prime is 667020797.

667020766 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 1650840 + ... + 1651243.

It is an arithmetic number, because the mean of its divisors is an integer number (126304713).

Almost surely, 2^667020766 is an apocalyptic number.

667020766 is a deficient number, since it is larger than the sum of its proper divisors (343416938).

667020766 is a wasteful number, since it uses less digits than its factorization.

667020766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3302186.

The product of its (nonzero) digits is 127008, while the sum is 40.

The square root of 667020766 is about 25826.7451685264. The cubic root of 667020766 is about 873.7351044907.

The spelling of 667020766 in words is "six hundred sixty-seven million, twenty thousand, seven hundred sixty-six".