1522065666 has 64 divisors (see below), whose sum is σ = 3413882880. Its totient is φ = 448493760.

The previous prime is 1522065653. The next prime is 1522065689. The reversal of 1522065666 is 6665602251.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 347160 + ... + 351516.

It is an arithmetic number, because the mean of its divisors is an integer number (53341920).

Almost surely, 2^1522065666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1522065666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1706941440).

1522065666 is an abundant number, since it is smaller than the sum of its proper divisors (1891817214).

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

1522065666 is a wasteful number, since it uses less digits than its factorization.

1522065666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4519.

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 1522065666 is about 39013.6599923668. The cubic root of 1522065666 is about 1150.3000265704.

The spelling of 1522065666 in words is "one billion, five hundred twenty-two million, sixty-five thousand, six hundred sixty-six".