66703950 has 72 divisors (see below), whose sum is σ = 180276408. Its totient is φ = 17682240.

The previous prime is 66703919. The next prime is 66703957. The reversal of 66703950 is 5930766.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66703957) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 101824 + ... + 102476.

It is an arithmetic number, because the mean of its divisors is an integer number (2503839).

Almost surely, 2^66703950 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66703950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90138204).

66703950 is an abundant number, since it is smaller than the sum of its proper divisors (113572458).

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

66703950 is a wasteful number, since it uses less digits than its factorization.

66703950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 898 (or 890 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 36.

The square root of 66703950 is about 8167.2486187210. The cubic root of 66703950 is about 405.5557072065. Note that the first 3 decimals are identical.

The spelling of 66703950 in words is "sixty-six million, seven hundred three thousand, nine hundred fifty".