2661326064 has 80 divisors (see below), whose sum is σ = 8088366240. Its totient is φ = 834923520.

The previous prime is 2661325999. The next prime is 2661326069. The reversal of 2661326064 is 4606231662.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661326069) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173847 + ... + 188534.

It is an arithmetic number, because the mean of its divisors is an integer number (101104578).

Almost surely, 2^2661326064 is an apocalyptic number.

2661326064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2661326064 is an abundant number, since it is smaller than the sum of its proper divisors (5427040176).

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

2661326064 is a wasteful number, since it uses less digits than its factorization.

2661326064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362415 (or 362403 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 2661326064 is about 51588.0418701854. The cubic root of 2661326064 is about 1385.7961882427.

The spelling of 2661326064 in words is "two billion, six hundred sixty-one million, three hundred twenty-six thousand, sixty-four".