667365744 has 60 divisors (see below), whose sum is σ = 1773516696. Its totient is φ = 216089856.

The previous prime is 667365731. The next prime is 667365757. The reversal of 667365744 is 447563766.

667365744 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (667365731) and next prime (667365757).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 667365693 and 667365702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1088382 + ... + 1088994.

Almost surely, 2^667365744 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 667365744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (886758348).

667365744 is an abundant number, since it is smaller than the sum of its proper divisors (1106150952).

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

667365744 is an equidigital number, since it uses as much as digits as its factorization.

667365744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1274 (or 655 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 48.

The square root of 667365744 is about 25833.4230019949. The cubic root of 667365744 is about 873.8857082176.

The spelling of 667365744 in words is "six hundred sixty-seven million, three hundred sixty-five thousand, seven hundred forty-four".