66461419 has 2 divisors, whose sum is σ = 66461420. Its totient is φ = 66461418.

The previous prime is 66461401. The next prime is 66461477. The reversal of 66461419 is 91416466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66461419 - 2¹³ = 66453227 is a prime.

It is a super-2 number, since 2×66461419² = 8834240430987122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66461719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33230709 + 33230710.

It is an arithmetic number, because the mean of its divisors is an integer number (33230710).

Almost surely, 2^66461419 is an apocalyptic number.

66461419 is a deficient number, since it is larger than the sum of its proper divisors (1).

66461419 is an equidigital number, since it uses as much as digits as its factorization.

66461419 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 37.

The square root of 66461419 is about 8152.3873190618. The cubic root of 66461419 is about 405.0635860129.

The spelling of 66461419 in words is "sixty-six million, four hundred sixty-one thousand, four hundred nineteen".