667729022 has 8 divisors (see below), whose sum is σ = 1004237400. Its totient is φ = 332983224.

The previous prime is 667729021. The next prime is 667729037. The reversal of 667729022 is 220927766.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667729021) 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 3 ways as a sum of consecutive naturals, for example, 439697 + ... + 441212.

It is an arithmetic number, because the mean of its divisors is an integer number (125529675).

Almost surely, 2^667729022 is an apocalyptic number.

667729022 is a deficient number, since it is larger than the sum of its proper divisors (336508378).

667729022 is a wasteful number, since it uses less digits than its factorization.

667729022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 881290.

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 667729022 is about 25840.4532080999. The cubic root of 667729022 is about 874.0442449067.

The spelling of 667729022 in words is "six hundred sixty-seven million, seven hundred twenty-nine thousand, twenty-two".