261660214 has 8 divisors (see below), whose sum is σ = 406024560. Its totient is φ = 126318696.

The previous prime is 261660197. The next prime is 261660227. The reversal of 261660214 is 412066162.

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

It is a congruent number.

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, 2255634 + ... + 2255749.

It is an arithmetic number, because the mean of its divisors is an integer number (50753070).

Almost surely, 2^261660214 is an apocalyptic number.

261660214 is a deficient number, since it is larger than the sum of its proper divisors (144364346).

261660214 is a wasteful number, since it uses less digits than its factorization.

261660214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4511414.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 261660214 is about 16175.9146263820. The cubic root of 261660214 is about 639.6060515022.

The spelling of 261660214 in words is "two hundred sixty-one million, six hundred sixty thousand, two hundred fourteen".