27399066772 has 72 divisors (see below), whose sum is σ = 61995598560. Its totient is φ = 10473503040.

The previous prime is 27399066763. The next prime is 27399066781. The reversal of 27399066772 is 27766099372.

It is an interprime number because it is at equal distance from previous prime (27399066763) and next prime (27399066781).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5622 + ... + 234157.

It is an arithmetic number, because the mean of its divisors is an integer number (861049980).

Almost surely, 2^27399066772 is an apocalyptic number.

27399066772 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27399066772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30997799280).

27399066772 is an abundant number, since it is smaller than the sum of its proper divisors (34596531788).

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

27399066772 is a wasteful number, since it uses less digits than its factorization.

27399066772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239861 (or 239852 counting only the distinct ones).

The product of its (nonzero) digits is 12002256, while the sum is 58.

The spelling of 27399066772 in words is "twenty-seven billion, three hundred ninety-nine million, sixty-six thousand, seven hundred seventy-two".