66100519 has 2 divisors, whose sum is σ = 66100520. Its totient is φ = 66100518.

The previous prime is 66100511. The next prime is 66100571. The reversal of 66100519 is 91500166.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66100519 - 2³ = 66100511 is a prime.

It is a super-2 number, since 2×66100519² = 8738557224138722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66100511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33050259 + 33050260.

It is an arithmetic number, because the mean of its divisors is an integer number (33050260).

Almost surely, 2^66100519 is an apocalyptic number.

66100519 is a deficient number, since it is larger than the sum of its proper divisors (1).

66100519 is an equidigital number, since it uses as much as digits as its factorization.

66100519 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 66100519 is about 8130.2225676792. Note that the first 3 decimals coincide. The cubic root of 66100519 is about 404.3290603212.

The spelling of 66100519 in words is "sixty-six million, one hundred thousand, five hundred nineteen".