666712102 has 32 divisors (see below), whose sum is σ = 1211719680. Its totient is φ = 269036640.

The previous prime is 666712087. The next prime is 666712141. The reversal of 666712102 is 201217666.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (31).

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, 4702 + ... + 36817.

It is an arithmetic number, because the mean of its divisors is an integer number (37866240).

Almost surely, 2^666712102 is an apocalyptic number.

666712102 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

666712102 is a deficient number, since it is larger than the sum of its proper divisors (545007578).

666712102 is a wasteful number, since it uses less digits than its factorization.

666712102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41596.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 666712102 is about 25820.7688111721. The cubic root of 666712102 is about 873.6003099953.

Adding to 666712102 its reverse (201217666), we get a palindrome (867929768).

It can be divided in two parts, 6667 and 12102, that added together give a square (18769 = 137²).

The spelling of 666712102 in words is "six hundred sixty-six million, seven hundred twelve thousand, one hundred two".