667142630 has 128 divisors (see below), whose sum is σ = 1627914240. Its totient is φ = 190512000.

The previous prime is 667142627. The next prime is 667142647. The reversal of 667142630 is 36241766.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

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 63 ways as a sum of consecutive naturals, for example, 452795 + ... + 454265.

It is an arithmetic number, because the mean of its divisors is an integer number (12718080).

Almost surely, 2^667142630 is an apocalyptic number.

667142630 is an abundant number, since it is smaller than the sum of its proper divisors (960771610).

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

667142630 is a wasteful number, since it uses less digits than its factorization.

667142630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1546.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 667142630 is about 25829.1043205141. The cubic root of 667142630 is about 873.7883114154.

The spelling of 667142630 in words is "six hundred sixty-seven million, one hundred forty-two thousand, six hundred thirty".