66273994 has 16 divisors (see below), whose sum is σ = 104087232. Its totient is φ = 31588128.

The previous prime is 66273953. The next prime is 66273997. The reversal of 66273994 is 49937266.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is not an unprimeable number, because it can be changed into a prime (66273997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12097 + ... + 16699.

It is an arithmetic number, because the mean of its divisors is an integer number (6505452).

Almost surely, 2^66273994 is an apocalyptic number.

66273994 is a deficient number, since it is larger than the sum of its proper divisors (37813238).

66273994 is a wasteful number, since it uses less digits than its factorization.

66273994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4941.

The product of its digits is 489888, while the sum is 46.

The square root of 66273994 is about 8140.8841043218. The cubic root of 66273994 is about 404.6824600347.

The spelling of 66273994 in words is "sixty-six million, two hundred seventy-three thousand, nine hundred ninety-four".