66983490 has 192 divisors, whose sum is σ = 213736320. Its totient is φ = 14878080.

The previous prime is 66983489. The next prime is 66983513. The reversal of 66983490 is 9438966.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 806989 + ... + 807071.

It is an arithmetic number, because the mean of its divisors is an integer number (1113210).

Almost surely, 2^66983490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66983490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106868160).

66983490 is an abundant number, since it is smaller than the sum of its proper divisors (146752830).

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

66983490 is a wasteful number, since it uses less digits than its factorization.

66983490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174 (or 161 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 66983490 is about 8184.3442009730. The cubic root of 66983490 is about 406.1214460307.

The spelling of 66983490 in words is "sixty-six million, nine hundred eighty-three thousand, four hundred ninety".