3278718664 has 16 divisors (see below), whose sum is σ = 6620489820. Its totient is φ = 1513254720.

The previous prime is 3278718659. The next prime is 3278718683. The reversal of 3278718664 is 4668178723.

It can be written as a sum of positive squares in 2 ways, for example, as 3278478564 + 240100 = 57258^2 + 490^2 .

It is a super-3 number, since 3×3278718664³ (a number of 30 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15762967 + ... + 15763174.

Almost surely, 2^3278718664 is an apocalyptic number.

It is an amenable number.

3278718664 is an abundant number, since it is smaller than the sum of its proper divisors (3341771156).

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

3278718664 is a wasteful number, since it uses less digits than its factorization.

3278718664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31526160 (or 31526156 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 52.

The square root of 3278718664 is about 57260.0966118640. The cubic root of 3278718664 is about 1485.5982676346.

The spelling of 3278718664 in words is "three billion, two hundred seventy-eight million, seven hundred eighteen thousand, six hundred sixty-four".