66133554 has 16 divisors (see below), whose sum is σ = 132663648. Its totient is φ = 21978432.

The previous prime is 66133523. The next prime is 66133583. The reversal of 66133554 is 45533166.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14332 + ... + 18375.

It is an arithmetic number, because the mean of its divisors is an integer number (8291478).

Almost surely, 2^66133554 is an apocalyptic number.

66133554 is an abundant number, since it is smaller than the sum of its proper divisors (66530094).

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

66133554 is a wasteful number, since it uses less digits than its factorization.

66133554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33049.

The product of its digits is 32400, while the sum is 33.

The square root of 66133554 is about 8132.2539311067. The cubic root of 66133554 is about 404.3964061665.

The spelling of 66133554 in words is "sixty-six million, one hundred thirty-three thousand, five hundred fifty-four".