667209996 has 36 divisors (see below), whose sum is σ = 1715149800. Its totient is φ = 218633088.

The previous prime is 667209971. The next prime is 667210003. The reversal of 667209996 is 699902766.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 154941 + ... + 159188.

It is an arithmetic number, because the mean of its divisors is an integer number (47643050).

Almost surely, 2^667209996 is an apocalyptic number.

It is an amenable number.

667209996 is an abundant number, since it is smaller than the sum of its proper divisors (1047939804).

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

667209996 is a wasteful number, since it uses less digits than its factorization.

667209996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314198 (or 314193 counting only the distinct ones).

The product of its (nonzero) digits is 2204496, while the sum is 54.

The square root of 667209996 is about 25830.4083591414. The cubic root of 667209996 is about 873.8177212395.

The spelling of 667209996 in words is "six hundred sixty-seven million, two hundred nine thousand, nine hundred ninety-six".