481551666 has 16 divisors (see below), whose sum is σ = 965001600. Its totient is φ = 160200848.

The previous prime is 481551661. The next prime is 481551691. The reversal of 481551666 is 666155184.

It is not an unprimeable number, because it can be changed into a prime (481551661) 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, 75786 + ... + 81893.

It is an arithmetic number, because the mean of its divisors is an integer number (60312600).

Almost surely, 2^481551666 is an apocalyptic number.

481551666 is an abundant number, since it is smaller than the sum of its proper divisors (483449934).

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

481551666 is a wasteful number, since it uses less digits than its factorization.

481551666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158193.

The product of its digits is 172800, while the sum is 42.

The square root of 481551666 is about 21944.2854975960. The cubic root of 481551666 is about 783.8163106114.

The spelling of 481551666 in words is "four hundred eighty-one million, five hundred fifty-one thousand, six hundred sixty-six".