247996660 has 12 divisors (see below), whose sum is σ = 520793028. Its totient is φ = 99198656.

The previous prime is 247996627. The next prime is 247996669. The reversal of 247996660 is 66699742.

It can be written as a sum of positive squares in 2 ways, for example, as 74442384 + 173554276 = 8628^2 + 13174^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247996669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6199897 + ... + 6199936.

It is an arithmetic number, because the mean of its divisors is an integer number (43399419).

Almost surely, 2^247996660 is an apocalyptic number.

247996660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

247996660 is an abundant number, since it is smaller than the sum of its proper divisors (272796368).

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

247996660 is a wasteful number, since it uses less digits than its factorization.

247996660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12399842 (or 12399840 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 49.

The square root of 247996660 is about 15747.9097025605. The cubic root of 247996660 is about 628.2733099787.

The spelling of 247996660 in words is "two hundred forty-seven million, nine hundred ninety-six thousand, six hundred sixty".