55518667 has 2 divisors, whose sum is σ = 55518668. Its totient is φ = 55518666.

The previous prime is 55518647. The next prime is 55518677. The reversal of 55518667 is 76681555.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55518667 - 2⁷ = 55518539 is a prime.

It is not a weakly prime, because it can be changed into another prime (55518607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27759333 + 27759334.

It is an arithmetic number, because the mean of its divisors is an integer number (27759334).

Almost surely, 2^55518667 is an apocalyptic number.

55518667 is a deficient number, since it is larger than the sum of its proper divisors (1).

55518667 is an equidigital number, since it uses as much as digits as its factorization.

55518667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 252000, while the sum is 43.

The square root of 55518667 is about 7451.0849545553. The cubic root of 55518667 is about 381.4869417754.

The spelling of 55518667 in words is "fifty-five million, five hundred eighteen thousand, six hundred sixty-seven".