7270421066 has 4 divisors (see below), whose sum is σ = 10905631602. Its totient is φ = 3635210532.

The previous prime is 7270421047. The next prime is 7270421069. The reversal of 7270421066 is 6601240727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6601240727 = 67 ⋅98525981.

It can be written as a sum of positive squares in only one way, i.e., 4266833041 + 3003588025 = 65321^2 + 54805^2 .

It is not an unprimeable number, because it can be changed into a prime (7270421069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1817605265 + ... + 1817605268.

Almost surely, 2^7270421066 is an apocalyptic number.

7270421066 is a deficient number, since it is larger than the sum of its proper divisors (3635210536).

7270421066 is a wasteful number, since it uses less digits than its factorization.

7270421066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3635210535.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 7270421066 is about 85266.7641346850. The cubic root of 7270421066 is about 1937.2537990652.

The spelling of 7270421066 in words is "seven billion, two hundred seventy million, four hundred twenty-one thousand, sixty-six".