1002156666 has 16 divisors (see below), whose sum is σ = 2290643904. Its totient is φ = 286330464.

The previous prime is 1002156601. The next prime is 1002156677. The reversal of 1002156666 is 6666512001.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11930395 + ... + 11930478.

It is an arithmetic number, because the mean of its divisors is an integer number (143165244).

Almost surely, 2^1002156666 is an apocalyptic number.

1002156666 is an abundant number, since it is smaller than the sum of its proper divisors (1288487238).

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

1002156666 is a wasteful number, since it uses less digits than its factorization.

1002156666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23860885.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 1002156666 is about 31656.8581195292. The cubic root of 1002156666 is about 1000.7183724841.

Adding to 1002156666 its reverse (6666512001), we get a palindrome (7668668667).

The spelling of 1002156666 in words is "one billion, two million, one hundred fifty-six thousand, six hundred sixty-six".