340456661 has 4 divisors (see below), whose sum is σ = 348760524. Its totient is φ = 332152800.

The previous prime is 340456657. The next prime is 340456679. The reversal of 340456661 is 166654043.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 166654043 = 17 ⋅9803179.

It can be written as a sum of positive squares in 2 ways, for example, as 106213636 + 234243025 = 10306^2 + 15305^2 .

It is a cyclic number.

It is not a de Polignac number, because 340456661 - 2² = 340456657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340456691) 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, 4151870 + ... + 4151951.

It is an arithmetic number, because the mean of its divisors is an integer number (87190131).

Almost surely, 2^340456661 is an apocalyptic number.

It is an amenable number.

340456661 is a deficient number, since it is larger than the sum of its proper divisors (8303863).

340456661 is an equidigital number, since it uses as much as digits as its factorization.

340456661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8303862.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 340456661 is about 18451.4677193984. The cubic root of 340456661 is about 698.2655433361.

The spelling of 340456661 in words is "three hundred forty million, four hundred fifty-six thousand, six hundred sixty-one".