61218300667 has 2 divisors, whose sum is σ = 61218300668. Its totient is φ = 61218300666.

The previous prime is 61218300623. The next prime is 61218300691. The reversal of 61218300667 is 76600381216.

It is a happy number.

61218300667 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61218300667 is a prime.

It is not a weakly prime, because it can be changed into another prime (61218300697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30609150333 + 30609150334.

It is an arithmetic number, because the mean of its divisors is an integer number (30609150334).

Almost surely, 2^61218300667 is an apocalyptic number.

61218300667 is a deficient number, since it is larger than the sum of its proper divisors (1).

61218300667 is an equidigital number, since it uses as much as digits as its factorization.

61218300667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 40.

The spelling of 61218300667 in words is "sixty-one billion, two hundred eighteen million, three hundred thousand, six hundred sixty-seven".