6604781406 has 16 divisors (see below), whose sum is σ = 13904803200. Its totient is φ = 2085720408.

The previous prime is 6604781341. The next prime is 6604781419. The reversal of 6604781406 is 6041874066.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28968226 + ... + 28968453.

It is an arithmetic number, because the mean of its divisors is an integer number (869050200).

Almost surely, 2^6604781406 is an apocalyptic number.

6604781406 is an abundant number, since it is smaller than the sum of its proper divisors (7300021794).

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

6604781406 is a wasteful number, since it uses less digits than its factorization.

6604781406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57936703.

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 6604781406 is about 81269.8062382334. The cubic root of 6604781406 is about 1876.2303184278.

The spelling of 6604781406 in words is "six billion, six hundred four million, seven hundred eighty-one thousand, four hundred six".