66411992 has 24 divisors (see below), whose sum is σ = 131274900. Its totient is φ = 31410720.

The previous prime is 66411991. The next prime is 66411997. The reversal of 66411992 is 29911466.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66411991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 100142 + ... + 100802.

Almost surely, 2^66411992 is an apocalyptic number.

It is an amenable number.

66411992 is a deficient number, since it is larger than the sum of its proper divisors (64862908).

66411992 is an equidigital number, since it uses as much as digits as its factorization.

66411992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1347 (or 682 counting only the distinct ones).

The product of its digits is 23328, while the sum is 38.

The square root of 66411992 is about 8149.3553119250. The cubic root of 66411992 is about 404.9631465729.

Multiplying 66411992 by its sum of digits (38), we get a square (2523655696 = 50236²).

66411992 divided by its sum of digits (38) gives a square (1747684 = 1322²).

The spelling of 66411992 in words is "sixty-six million, four hundred eleven thousand, nine hundred ninety-two".