667072305 has 24 divisors (see below), whose sum is σ = 1165095360. Its totient is φ = 353052960.

The previous prime is 667072303. The next prime is 667072313. The reversal of 667072305 is 503270766.

It is a happy number.

It is not a de Polignac number, because 667072305 - 2¹ = 667072303 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 667072305.

It is not an unprimeable number, because it can be changed into a prime (667072303) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50685 + ... + 62474.

It is an arithmetic number, because the mean of its divisors is an integer number (48545640).

Almost surely, 2^667072305 is an apocalyptic number.

It is an amenable number.

667072305 is a deficient number, since it is larger than the sum of its proper divisors (498023055).

667072305 is a wasteful number, since it uses less digits than its factorization.

667072305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113301 (or 113298 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 36.

The square root of 667072305 is about 25827.7429327458. The cubic root of 667072305 is about 873.7576076750.

The spelling of 667072305 in words is "six hundred sixty-seven million, seventy-two thousand, three hundred five".