247080665 has 8 divisors (see below), whose sum is σ = 319304328. Its totient is φ = 182459520.

The previous prime is 247080629. The next prime is 247080679. The reversal of 247080665 is 566080742.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6086089 + 240994576 = 2467^2 + 15524^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 247080665 - 2⁸ = 247080409 is a prime.

It is a super-2 number, since 2×247080665² = 122097710033684450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1900556 + ... + 1900685.

It is an arithmetic number, because the mean of its divisors is an integer number (39913041).

Almost surely, 2^247080665 is an apocalyptic number.

It is an amenable number.

247080665 is a deficient number, since it is larger than the sum of its proper divisors (72223663).

247080665 is a wasteful number, since it uses less digits than its factorization.

247080665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3801259.

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 247080665 is about 15718.7997315317. The cubic root of 247080665 is about 627.4988301751.

The spelling of 247080665 in words is "two hundred forty-seven million, eighty thousand, six hundred sixty-five".