66231480 has 128 divisors (see below), whose sum is σ = 233326080. Its totient is φ = 14722560.

The previous prime is 66231479. The next prime is 66231521. The reversal of 66231480 is 8413266.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30015 + ... + 32145.

It is an arithmetic number, because the mean of its divisors is an integer number (1822860).

Almost surely, 2^66231480 is an apocalyptic number.

66231480 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66231480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116663040).

66231480 is an abundant number, since it is smaller than the sum of its proper divisors (167094600).

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

66231480 is a wasteful number, since it uses less digits than its factorization.

66231480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2189 (or 2185 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 66231480 is about 8138.2725439739. The cubic root of 66231480 is about 404.5959084869.

The spelling of 66231480 in words is "sixty-six million, two hundred thirty-one thousand, four hundred eighty".