9001566537 has 4 divisors (see below), whose sum is σ = 12002088720. Its totient is φ = 6001044356.

The previous prime is 9001566529. The next prime is 9001566569. The reversal of 9001566537 is 7356651009.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9001566537 - 2³ = 9001566529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9001566037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1500261087 + ... + 1500261092.

It is an arithmetic number, because the mean of its divisors is an integer number (3000522180).

Almost surely, 2^9001566537 is an apocalyptic number.

It is an amenable number.

9001566537 is a deficient number, since it is larger than the sum of its proper divisors (3000522183).

9001566537 is a wasteful number, since it uses less digits than its factorization.

9001566537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3000522182.

The product of its (nonzero) digits is 170100, while the sum is 42.

The square root of 9001566537 is about 94876.5858207387. The cubic root of 9001566537 is about 2080.2045022827.

The spelling of 9001566537 in words is "nine billion, one million, five hundred sixty-six thousand, five hundred thirty-seven".