7121521466 has 8 divisors (see below), whose sum is σ = 10690021524. Its totient is φ = 3558180960.

The previous prime is 7121521457. The next prime is 7121521471. The reversal of 7121521466 is 6641251217.

It can be written as a sum of positive squares in 2 ways, for example, as 6985449241 + 136072225 = 83579^2 + 11665^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1286435 + ... + 1291958.

Almost surely, 2^7121521466 is an apocalyptic number.

7121521466 is a deficient number, since it is larger than the sum of its proper divisors (3568500058).

7121521466 is a wasteful number, since it uses less digits than its factorization.

7121521466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2579776.

The product of its digits is 20160, while the sum is 35.

The square root of 7121521466 is about 84389.1075080191. The cubic root of 7121521466 is about 1923.9373651418.

The spelling of 7121521466 in words is "seven billion, one hundred twenty-one million, five hundred twenty-one thousand, four hundred sixty-six".