1565212066 has 32 divisors (see below), whose sum is σ = 2716701120. Its totient is φ = 668428800.

The previous prime is 1565212057. The next prime is 1565212081. The reversal of 1565212066 is 6602125651.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

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, 228126 + ... + 234886.

It is an arithmetic number, because the mean of its divisors is an integer number (84896910).

Almost surely, 2^1565212066 is an apocalyptic number.

1565212066 is a deficient number, since it is larger than the sum of its proper divisors (1151489054).

1565212066 is a wasteful number, since it uses less digits than its factorization.

1565212066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7410.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 1565212066 is about 39562.7611018240. The cubic root of 1565212066 is about 1161.0681960840.

The spelling of 1565212066 in words is "one billion, five hundred sixty-five million, two hundred twelve thousand, sixty-six".