2640213366 has 64 divisors (see below), whose sum is σ = 6230696448. Its totient is φ = 730073088.

The previous prime is 2640213353. The next prime is 2640213371. The reversal of 2640213366 is 6633120462.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 295521 + ... + 304323.

It is an arithmetic number, because the mean of its divisors is an integer number (97354632).

Almost surely, 2^2640213366 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2640213366, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3115348224).

2640213366 is an abundant number, since it is smaller than the sum of its proper divisors (3590483082).

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

2640213366 is a wasteful number, since it uses less digits than its factorization.

2640213366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9045.

The product of its (nonzero) digits is 31104, while the sum is 33.

The square root of 2640213366 is about 51383.0065877815. The cubic root of 2640213366 is about 1382.1218785690.

The spelling of 2640213366 in words is "two billion, six hundred forty million, two hundred thirteen thousand, three hundred sixty-six".