1536606666 has 32 divisors (see below), whose sum is σ = 3902494080. Its totient is φ = 439030368.

The previous prime is 1536606647. The next prime is 1536606719. The reversal of 1536606666 is 6666066351.

It is a super-2 number, since 2×1536606666² = 4722320091991271112, which contains 22 as substring.

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, 2032171 + ... + 2032926.

It is an arithmetic number, because the mean of its divisors is an integer number (121952940).

Almost surely, 2^1536606666 is an apocalyptic number.

1536606666 is an abundant number, since it is smaller than the sum of its proper divisors (2365887414).

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

1536606666 is a wasteful number, since it uses less digits than its factorization.

1536606666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4065115 (or 4065109 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 45.

The square root of 1536606666 is about 39199.5748191227. The cubic root of 1536606666 is about 1153.9515396851.

The spelling of 1536606666 in words is "one billion, five hundred thirty-six million, six hundred six thousand, six hundred sixty-six".