6620145264 has 30 divisors (see below), whose sum is σ = 18527212496. Its totient is φ = 2206715040.

The previous prime is 6620145251. The next prime is 6620145277. The reversal of 6620145264 is 4625410266.

6620145264 is a `hidden beast` number, since 6 + 620 + 1 + 4 + 5 + 26 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (6620145251) and next prime (6620145277).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22986472 + ... + 22986759.

Almost surely, 2^6620145264 is an apocalyptic number.

It is an amenable number.

6620145264 is an abundant number, since it is smaller than the sum of its proper divisors (11907067232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6620145264 is a wasteful number, since it uses less digits than its factorization.

6620145264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45973245 (or 45973236 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 6620145264 is about 81364.2751089199. The cubic root of 6620145264 is about 1877.6840033539.

The spelling of 6620145264 in words is "six billion, six hundred twenty million, one hundred forty-five thousand, two hundred sixty-four".