551520066 has 16 divisors (see below), whose sum is σ = 1104012288. Its totient is φ = 183678000.

The previous prime is 551520061. The next prime is 551520077. The reversal of 551520066 is 660025155.

It is not an unprimeable number, because it can be changed into a prime (551520061) 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, 33025 + ... + 46836.

It is an arithmetic number, because the mean of its divisors is an integer number (69000768).

Almost surely, 2^551520066 is an apocalyptic number.

551520066 is an abundant number, since it is smaller than the sum of its proper divisors (552492222).

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

551520066 is a wasteful number, since it uses less digits than its factorization.

551520066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81017.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 551520066 is about 23484.4643541214. The cubic root of 551520066 is about 820.0753777624.

The spelling of 551520066 in words is "five hundred fifty-one million, five hundred twenty thousand, sixty-six".