6466731390 has 240 divisors, whose sum is σ = 20566522944. Its totient is φ = 1453334400.

The previous prime is 6466731289. The next prime is 6466731391. The reversal of 6466731390 is 931376646.

It is a super-2 number, since 2×6466731390² = 83637229740822664200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6466731391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 2419755 + ... + 2422425.

Almost surely, 2^6466731390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6466731390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10283261472).

6466731390 is an abundant number, since it is smaller than the sum of its proper divisors (14099791554).

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

6466731390 is a wasteful number, since it uses less digits than its factorization.

6466731390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2765 (or 2749 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 45.

The square root of 6466731390 is about 80415.9896413642. The cubic root of 6466731390 is about 1863.0661446639.

The spelling of 6466731390 in words is "six billion, four hundred sixty-six million, seven hundred thirty-one thousand, three hundred ninety".