66404950 has 12 divisors (see below), whose sum is σ = 123513300. Its totient is φ = 26561960.

The previous prime is 66404929. The next prime is 66404971. The reversal of 66404950 is 5940466.

It is an interprime number because it is at equal distance from previous prime (66404929) and next prime (66404971).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 664000 + ... + 664099.

It is an arithmetic number, because the mean of its divisors is an integer number (10292775).

Almost surely, 2^66404950 is an apocalyptic number.

66404950 is a deficient number, since it is larger than the sum of its proper divisors (57108350).

66404950 is a wasteful number, since it uses less digits than its factorization.

66404950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328111 (or 1328106 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 66404950 is about 8148.9232417541. The cubic root of 66404950 is about 404.9488326356.

The spelling of 66404950 in words is "sixty-six million, four hundred four thousand, nine hundred fifty".