66463405 has 16 divisors (see below), whose sum is σ = 82036224. Its totient is φ = 51667200.

The previous prime is 66463393. The next prime is 66463429. The reversal of 66463405 is 50436466.

It is not a de Polignac number, because 66463405 - 2⁷ = 66463277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34549 + ... + 36421.

It is an arithmetic number, because the mean of its divisors is an integer number (5127264).

Almost surely, 2^66463405 is an apocalyptic number.

It is an amenable number.

66463405 is a deficient number, since it is larger than the sum of its proper divisors (15572819).

66463405 is a wasteful number, since it uses less digits than its factorization.

66463405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2076.

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 66463405 is about 8152.5091229633. The cubic root of 66463405 is about 405.0676206758.

The spelling of 66463405 in words is "sixty-six million, four hundred sixty-three thousand, four hundred five".