666711030 has 32 divisors (see below), whose sum is σ = 1601073504. Its totient is φ = 177682176.

The previous prime is 666710987. The next prime is 666711043. The reversal of 666711030 is 30117666.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52242 + ... + 63738.

It is an arithmetic number, because the mean of its divisors is an integer number (50033547).

Almost surely, 2^666711030 is an apocalyptic number.

666711030 is an abundant number, since it is smaller than the sum of its proper divisors (934362474).

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

666711030 is a wasteful number, since it uses less digits than its factorization.

666711030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13440.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 666711030 is about 25820.7480526804. The cubic root of 666711030 is about 873.5998417772.

Adding to 666711030 its reverse (30117666), we get a palindrome (696828696).

The spelling of 666711030 in words is "six hundred sixty-six million, seven hundred eleven thousand, thirty".