667514540 has 96 divisors (see below), whose sum is σ = 1761951744. Its totient is φ = 206357760.

The previous prime is 667514527. The next prime is 667514543. The reversal of 667514540 is 45415766.

It is a super-2 number, since 2×667514540² = 891151322222823200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 667514494 and 667514503.

It is not an unprimeable number, because it can be changed into a prime (667514543) 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 31 ways as a sum of consecutive naturals, for example, 193874 + ... + 197286.

It is an arithmetic number, because the mean of its divisors is an integer number (18353664).

Almost surely, 2^667514540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667514540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (880975872).

667514540 is an abundant number, since it is smaller than the sum of its proper divisors (1094437204).

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

667514540 is a wasteful number, since it uses less digits than its factorization.

667514540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3567 (or 3565 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 38.

The square root of 667514540 is about 25836.3027540707. The cubic root of 667514540 is about 873.9506506355.

The spelling of 667514540 in words is "six hundred sixty-seven million, five hundred fourteen thousand, five hundred forty".