6420516366 has 32 divisors (see below), whose sum is σ = 14745686400. Its totient is φ = 1843210080.

The previous prime is 6420516341. The next prime is 6420516391. The reversal of 6420516366 is 6636150246.

It is an interprime number because it is at equal distance from previous prime (6420516341) and next prime (6420516391).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2558761 + ... + 2561268.

It is an arithmetic number, because the mean of its divisors is an integer number (460802700).

Almost surely, 2^6420516366 is an apocalyptic number.

6420516366 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

6420516366 is an abundant number, since it is smaller than the sum of its proper divisors (8325170034).

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

6420516366 is a wasteful number, since it uses less digits than its factorization.

6420516366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5120064.

The product of its (nonzero) digits is 155520, while the sum is 39.

The square root of 6420516366 is about 80128.1246879022. The cubic root of 6420516366 is about 1858.6173450846.

The spelling of 6420516366 in words is "six billion, four hundred twenty million, five hundred sixteen thousand, three hundred sixty-six".