66494000 has 40 divisors (see below), whose sum is σ = 160787328. Its totient is φ = 26596800.

The previous prime is 66493981. The next prime is 66494009. The reversal of 66494000 is 49466.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (66494009) 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, 14624 + ... + 18623.

Almost surely, 2^66494000 is an apocalyptic number.

It is an amenable number.

66494000 is an abundant number, since it is smaller than the sum of its proper divisors (94293328).

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

66494000 is a wasteful number, since it uses less digits than its factorization.

66494000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33270 (or 33254 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 66494000 is about 8154.3853232479. The cubic root of 66494000 is about 405.1297658654.

The spelling of 66494000 in words is "sixty-six million, four hundred ninety-four thousand".