667689480 has 80 divisors (see below), whose sum is σ = 2244189420. Its totient is φ = 178049664.

The previous prime is 667689427. The next prime is 667689553. The reversal of 667689480 is 84986766.

It can be written as a sum of positive squares in 2 ways, for example, as 635947524 + 31741956 = 25218^2 + 5634^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 99799 + ... + 106278.

Almost surely, 2^667689480 is an apocalyptic number.

667689480 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

667689480 is an abundant number, since it is smaller than the sum of its proper divisors (1576499940).

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

667689480 is a wasteful number, since it uses less digits than its factorization.

667689480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206100 (or 206087 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The square root of 667689480 is about 25839.6880786127. The cubic root of 667689480 is about 874.0269913310.

The spelling of 667689480 in words is "six hundred sixty-seven million, six hundred eighty-nine thousand, four hundred eighty".