2667506521 has 4 divisors (see below), whose sum is σ = 2680148944. Its totient is φ = 2654864100.

The previous prime is 2667506519. The next prime is 2667506563. The reversal of 2667506521 is 1256057662.

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 2667506521 - 2¹ = 2667506519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2667506221) 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, 6320895 + ... + 6321316.

It is an arithmetic number, because the mean of its divisors is an integer number (670037236).

Almost surely, 2^2667506521 is an apocalyptic number.

It is an amenable number.

2667506521 is a deficient number, since it is larger than the sum of its proper divisors (12642423).

2667506521 is a wasteful number, since it uses less digits than its factorization.

2667506521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12642422.

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 2667506521 is about 51647.9091638761. The cubic root of 2667506521 is about 1386.8681140383.

The spelling of 2667506521 in words is "two billion, six hundred sixty-seven million, five hundred six thousand, five hundred twenty-one".