214610661 has 8 divisors (see below), whose sum is σ = 317941760. Its totient is φ = 143073756.

The previous prime is 214610653. The next prime is 214610663. The reversal of 214610661 is 166016412.

It is not a de Polignac number, because 214610661 - 2³ = 214610653 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 7948543 = 214610661 / (2 + 1 + 4 + 6 + 1 + 0 + 6 + 6 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (214610663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3974245 + ... + 3974298.

It is an arithmetic number, because the mean of its divisors is an integer number (39742720).

Almost surely, 2^214610661 is an apocalyptic number.

It is an amenable number.

214610661 is a deficient number, since it is larger than the sum of its proper divisors (103331099).

214610661 is an equidigital number, since it uses as much as digits as its factorization.

214610661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7948552 (or 7948546 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 214610661 is about 14649.5959329942. The cubic root of 214610661 is about 598.7108069528.

The spelling of 214610661 in words is "two hundred fourteen million, six hundred ten thousand, six hundred sixty-one".