667040704 has 28 divisors (see below), whose sum is σ = 1443993048. Its totient is φ = 303200000.

The previous prime is 667040701. The next prime is 667040729. The reversal of 667040704 is 407040766.

It is a self number, because there is not a number n which added to its sum of digits gives 667040704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667040701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 473047 + ... + 474454.

Almost surely, 2^667040704 is an apocalyptic number.

667040704 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

667040704 is an abundant number, since it is smaller than the sum of its proper divisors (776952344).

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

667040704 is a wasteful number, since it uses less digits than its factorization.

667040704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 947524 (or 947514 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 667040704 is about 25827.1311608549. The cubic root of 667040704 is about 873.7438100452.

It can be divided in two parts, 6670 and 40704, that added together give a palindrome (47374).

The spelling of 667040704 in words is "six hundred sixty-seven million, forty thousand, seven hundred four".