6656150521 has 4 divisors (see below), whose sum is σ = 6669490000. Its totient is φ = 6642811044.

The previous prime is 6656150519. The next prime is 6656150537. The reversal of 6656150521 is 1250516566.

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 6656150521 - 2¹ = 6656150519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6656150551) 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, 6668991 + ... + 6669988.

It is an arithmetic number, because the mean of its divisors is an integer number (1667372500).

Almost surely, 2^6656150521 is an apocalyptic number.

It is an amenable number.

6656150521 is a deficient number, since it is larger than the sum of its proper divisors (13339479).

6656150521 is a wasteful number, since it uses less digits than its factorization.

6656150521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13339478.

The product of its (nonzero) digits is 54000, while the sum is 37.

The square root of 6656150521 is about 81585.2346996685. The cubic root of 6656150521 is about 1881.0819297672.

The spelling of 6656150521 in words is "six billion, six hundred fifty-six million, one hundred fifty thousand, five hundred twenty-one".