66493954 has 4 divisors (see below), whose sum is σ = 99740934. Its totient is φ = 33246976.

The previous prime is 66493937. The next prime is 66493969. The reversal of 66493954 is 45939466.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 45927729 + 20566225 = 6777^2 + 4535^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16623487 + ... + 16623490.

Almost surely, 2^66493954 is an apocalyptic number.

66493954 is a deficient number, since it is larger than the sum of its proper divisors (33246980).

66493954 is a wasteful number, since it uses less digits than its factorization.

66493954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33246979.

The product of its digits is 699840, while the sum is 46.

The square root of 66493954 is about 8154.3825026792. The cubic root of 66493954 is about 405.1296724436.

The spelling of 66493954 in words is "sixty-six million, four hundred ninety-three thousand, nine hundred fifty-four".