666740102 has 32 divisors (see below), whose sum is σ = 1251961920. Its totient is φ = 259660800.

The previous prime is 666740101. The next prime is 666740117. The reversal of 666740102 is 201047666.

It is a super-2 number, since 2×666740102² = 889084727229940808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666740101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41399 + ... + 55202.

It is an arithmetic number, because the mean of its divisors is an integer number (39123810).

Almost surely, 2^666740102 is an apocalyptic number.

666740102 is a deficient number, since it is larger than the sum of its proper divisors (585221818).

666740102 is a wasteful number, since it uses less digits than its factorization.

666740102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96656.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 666740102 is about 25821.3110046721. The cubic root of 666740102 is about 873.6125393949.

Adding to 666740102 its reverse (201047666), we get a palindrome (867787768).

The spelling of 666740102 in words is "six hundred sixty-six million, seven hundred forty thousand, one hundred two".