667377612 has 36 divisors (see below), whose sum is σ = 1840345416. Its totient is φ = 202235520.

The previous prime is 667377611. The next prime is 667377617. The reversal of 667377612 is 216773766.

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

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (667377611) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 842253 + ... + 843044.

It is an arithmetic number, because the mean of its divisors is an integer number (51120706).

Almost surely, 2^667377612 is an apocalyptic number.

It is an amenable number.

667377612 is an abundant number, since it is smaller than the sum of its proper divisors (1172967804).

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

667377612 is a wasteful number, since it uses less digits than its factorization.

667377612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1685318 (or 1685313 counting only the distinct ones).

The product of its digits is 444528, while the sum is 45.

The square root of 667377612 is about 25833.6527034022. The cubic root of 667377612 is about 873.8908883927.

The spelling of 667377612 in words is "six hundred sixty-seven million, three hundred seventy-seven thousand, six hundred twelve".