666722102 has 8 divisors (see below), whose sum is σ = 1000300536. Its totient is φ = 333288592.

The previous prime is 666722081. The next prime is 666722113. The reversal of 666722102 is 201227666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×666722102² = 889036722590596808, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23888 + ... + 43635.

It is an arithmetic number, because the mean of its divisors is an integer number (125037567).

Almost surely, 2^666722102 is an apocalyptic number.

666722102 is a deficient number, since it is larger than the sum of its proper divisors (333578434).

666722102 is a wasteful number, since it uses less digits than its factorization.

666722102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72462.

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

The square root of 666722102 is about 25820.9624530148. The cubic root of 666722102 is about 873.6046776773.

Adding to 666722102 its reverse (201227666), we get a palindrome (867949768).

The spelling of 666722102 in words is "six hundred sixty-six million, seven hundred twenty-two thousand, one hundred two".