6620251293 has 12 divisors (see below), whose sum is σ = 9571316508. Its totient is φ = 4409471040.

The previous prime is 6620251277. The next prime is 6620251303. The reversal of 6620251293 is 3921520266.

6620251293 is a `hidden beast` number, since 6 + 620 + 2 + 5 + 1 + 29 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2088672804 + 4531578489 = 45702^2 + 67317^2 .

It is not a de Polignac number, because 6620251293 - 2⁴ = 6620251277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6620251213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 325398 + ... + 345143.

It is an arithmetic number, because the mean of its divisors is an integer number (797609709).

Almost surely, 2^6620251293 is an apocalyptic number.

It is an amenable number.

6620251293 is a deficient number, since it is larger than the sum of its proper divisors (2951065215).

6620251293 is a wasteful number, since it uses less digits than its factorization.

6620251293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671644 (or 671641 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 6620251293 is about 81364.9266760562. The cubic root of 6620251293 is about 1877.6940277006.

The spelling of 6620251293 in words is "six billion, six hundred twenty million, two hundred fifty-one thousand, two hundred ninety-three".