667554140 has 48 divisors (see below), whose sum is σ = 1531129824. Its totient is φ = 242457600.

The previous prime is 667554131. The next prime is 667554149. The reversal of 667554140 is 41455766.

It is an interprime number because it is at equal distance from previous prime (667554131) and next prime (667554149).

It is a super-2 number, since 2×667554140² = 891257059662279200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 667554094 and 667554103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667554149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 289472 + ... + 291768.

It is an arithmetic number, because the mean of its divisors is an integer number (31898538).

Almost surely, 2^667554140 is an apocalyptic number.

It is an amenable number.

667554140 is an abundant number, since it is smaller than the sum of its proper divisors (863575684).

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

667554140 is a wasteful number, since it uses less digits than its factorization.

667554140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3638 (or 3636 counting only the distinct ones).

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

The square root of 667554140 is about 25837.0691062280. The cubic root of 667554140 is about 873.9679325369.

The spelling of 667554140 in words is "six hundred sixty-seven million, five hundred fifty-four thousand, one hundred forty".