667661335 has 16 divisors (see below), whose sum is σ = 875888640. Its totient is φ = 484539040.

The previous prime is 667661327. The next prime is 667661359. The reversal of 667661335 is 533166766.

It is not a de Polignac number, because 667661335 - 2³ = 667661327 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 667661291 and 667661300.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13674 + ... + 39016.

It is an arithmetic number, because the mean of its divisors is an integer number (54743040).

Almost surely, 2^667661335 is an apocalyptic number.

667661335 is a deficient number, since it is larger than the sum of its proper divisors (208227305).

667661335 is a wasteful number, since it uses less digits than its factorization.

667661335 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25838.

The product of its digits is 408240, while the sum is 43.

The square root of 667661335 is about 25839.1434649061. The cubic root of 667661335 is about 874.0147102552.

The spelling of 667661335 in words is "six hundred sixty-seven million, six hundred sixty-one thousand, three hundred thirty-five".