66983070 has 128 divisors (see below), whose sum is σ = 203046912. Its totient is φ = 13737600.

The previous prime is 66983047. The next prime is 66983083. The reversal of 66983070 is 7038966.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 247035 + ... + 247305.

It is an arithmetic number, because the mean of its divisors is an integer number (1586304).

Almost surely, 2^66983070 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66983070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101523456).

66983070 is an abundant number, since it is smaller than the sum of its proper divisors (136063842).

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

66983070 is a wasteful number, since it uses less digits than its factorization.

66983070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 66983070 is about 8184.3185421879. The cubic root of 66983070 is about 406.1205972078.

The spelling of 66983070 in words is "sixty-six million, nine hundred eighty-three thousand, seventy".