666474480 has 300 divisors, whose sum is σ = 2693968200. Its totient is φ = 152264448.

The previous prime is 666474407. The next prime is 666474499. The reversal of 666474480 is 84474666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 316471 + ... + 318569.

It is an arithmetic number, because the mean of its divisors is an integer number (8979894).

Almost surely, 2^666474480 is an apocalyptic number.

666474480 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 666474480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1346984100).

666474480 is an abundant number, since it is smaller than the sum of its proper divisors (2027493720).

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

666474480 is a wasteful number, since it uses less digits than its factorization.

666474480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2138 (or 2116 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 45.

The square root of 666474480 is about 25816.1670276592. The cubic root of 666474480 is about 873.4965114096.

The spelling of 666474480 in words is "six hundred sixty-six million, four hundred seventy-four thousand, four hundred eighty".