667380654 has 64 divisors (see below), whose sum is σ = 1541736000. Its totient is φ = 213736320.

The previous prime is 667380653. The next prime is 667380667. The reversal of 667380654 is 456083766.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667380653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 357684 + ... + 359544.

It is an arithmetic number, because the mean of its divisors is an integer number (24089625).

Almost surely, 2^667380654 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667380654, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (770868000).

667380654 is an abundant number, since it is smaller than the sum of its proper divisors (874355346).

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

667380654 is a wasteful number, since it uses less digits than its factorization.

667380654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2130 (or 2124 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The square root of 667380654 is about 25833.7115800266. The cubic root of 667380654 is about 873.8922161627.

The spelling of 667380654 in words is "six hundred sixty-seven million, three hundred eighty thousand, six hundred fifty-four".