667406734 has 32 divisors (see below), whose sum is σ = 1040888736. Its totient is φ = 320785920.

The previous prime is 667406681. The next prime is 667406737. The reversal of 667406734 is 437604766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667406737) by changing a digit.

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, 1219849 + ... + 1220395.

It is an arithmetic number, because the mean of its divisors is an integer number (32527773).

Almost surely, 2^667406734 is an apocalyptic number.

667406734 is a deficient number, since it is larger than the sum of its proper divisors (373482002).

667406734 is a wasteful number, since it uses less digits than its factorization.

667406734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820.

The product of its (nonzero) digits is 508032, while the sum is 43.

The square root of 667406734 is about 25834.2163418982. The cubic root of 667406734 is about 873.9035993776.

The spelling of 667406734 in words is "six hundred sixty-seven million, four hundred six thousand, seven hundred thirty-four".