66315552 has 24 divisors (see below), whose sum is σ = 174078576. Its totient is φ = 22105152.

The previous prime is 66315539. The next prime is 66315563. The reversal of 66315552 is 25551366.

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 345298 + ... + 345489.

It is an arithmetic number, because the mean of its divisors is an integer number (7253274).

Almost surely, 2^66315552 is an apocalyptic number.

It is an amenable number.

66315552 is an abundant number, since it is smaller than the sum of its proper divisors (107763024).

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

66315552 is a wasteful number, since it uses less digits than its factorization.

66315552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690800 (or 690792 counting only the distinct ones).

The product of its digits is 27000, while the sum is 33.

The square root of 66315552 is about 8143.4361297919. The cubic root of 66315552 is about 404.7670295549.

The spelling of 66315552 in words is "sixty-six million, three hundred fifteen thousand, five hundred fifty-two".