246420840661 has 2 divisors, whose sum is σ = 246420840662. Its totient is φ = 246420840660.

The previous prime is 246420840649. The next prime is 246420840691. The reversal of 246420840661 is 166048024642.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 245217097636 + 1203743025 = 495194^2 + 34695^2 .

It is a cyclic number.

It is not a de Polignac number, because 246420840661 - 2²³ = 246412452053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (246420840691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123210420330 + 123210420331.

It is an arithmetic number, because the mean of its divisors is an integer number (123210420331).

Almost surely, 2^246420840661 is an apocalyptic number.

It is an amenable number.

246420840661 is a deficient number, since it is larger than the sum of its proper divisors (1).

246420840661 is an equidigital number, since it uses as much as digits as its factorization.

246420840661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 442368, while the sum is 43.

The spelling of 246420840661 in words is "two hundred forty-six billion, four hundred twenty million, eight hundred forty thousand, six hundred sixty-one".