667605430 has 32 divisors (see below), whose sum is σ = 1237257504. Its totient is φ = 259174656.

The previous prime is 667605409. The next prime is 667605431. The reversal of 667605430 is 34506766.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a self number, because there is not a number n which added to its sum of digits gives 667605430.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667605431) 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, 161874 + ... + 165946.

It is an arithmetic number, because the mean of its divisors is an integer number (38664297).

Almost surely, 2^667605430 is an apocalyptic number.

667605430 is a deficient number, since it is larger than the sum of its proper divisors (569652074).

667605430 is a wasteful number, since it uses less digits than its factorization.

667605430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4560.

The product of its (nonzero) digits is 90720, while the sum is 37.

The square root of 667605430 is about 25838.0616533052. The cubic root of 667605430 is about 873.9903150747.

The spelling of 667605430 in words is "six hundred sixty-seven million, six hundred five thousand, four hundred thirty".