66492405 has 48 divisors (see below), whose sum is σ = 134808960. Its totient is φ = 29683584.

The previous prime is 66492383. The next prime is 66492409. The reversal of 66492405 is 50429466.

66492405 is a `hidden beast` number, since 6 + 649 + 2 + 4 + 0 + 5 = 666.

It is not a de Polignac number, because 66492405 - 2⁵ = 66492373 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66492405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66492409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11091 + ... + 15999.

It is an arithmetic number, because the mean of its divisors is an integer number (2808520).

Almost surely, 2^66492405 is an apocalyptic number.

It is an amenable number.

66492405 is an abundant number, since it is smaller than the sum of its proper divisors (68316555).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66492405 is a wasteful number, since it uses less digits than its factorization.

66492405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4970 (or 4967 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 66492405 is about 8154.2875225246. The cubic root of 66492405 is about 405.1265265398.

The spelling of 66492405 in words is "sixty-six million, four hundred ninety-two thousand, four hundred five".