66216054 has 32 divisors (see below), whose sum is σ = 142611840. Its totient is φ = 20419712.

The previous prime is 66216053. The next prime is 66216097. The reversal of 66216054 is 45061266.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66216053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 517 + ... + 11519.

It is an arithmetic number, because the mean of its divisors is an integer number (4456620).

Almost surely, 2^66216054 is an apocalyptic number.

66216054 is an abundant number, since it is smaller than the sum of its proper divisors (76395786).

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

66216054 is a wasteful number, since it uses less digits than its factorization.

66216054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11084.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 66216054 is about 8137.3247446566. The cubic root of 66216054 is about 404.5644945173.

The spelling of 66216054 in words is "sixty-six million, two hundred sixteen thousand, fifty-four".