667376280 has 256 divisors, whose sum is σ = 2361830400. Its totient is φ = 167270400.

The previous prime is 667376267. The next prime is 667376291. The reversal of 667376280 is 82673766.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1664080 + ... + 1664480.

It is an arithmetic number, because the mean of its divisors is an integer number (9225900).

Almost surely, 2^667376280 is an apocalyptic number.

667376280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667376280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1180915200).

667376280 is an abundant number, since it is smaller than the sum of its proper divisors (1694454120).

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

667376280 is a wasteful number, since it uses less digits than its factorization.

667376280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511 (or 501 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The square root of 667376280 is about 25833.6269230629. The cubic root of 667376280 is about 873.8903070009.

The spelling of 667376280 in words is "six hundred sixty-seven million, three hundred seventy-six thousand, two hundred eighty".