66457850 has 24 divisors (see below), whose sum is σ = 127876860. Its totient is φ = 25665920.

The previous prime is 66457829. The next prime is 66457907. The reversal of 66457850 is 5875466.

It can be written as a sum of positive squares in 6 ways, for example, as 29235649 + 37222201 = 5407^2 + 6101^2 .

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66457798 and 66457807.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21467 + ... + 24366.

Almost surely, 2^66457850 is an apocalyptic number.

66457850 is a deficient number, since it is larger than the sum of its proper divisors (61419010).

66457850 is a wasteful number, since it uses less digits than its factorization.

66457850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45874 (or 45869 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 41.

The square root of 66457850 is about 8152.1684231866. The cubic root of 66457850 is about 405.0563352006.

The spelling of 66457850 in words is "sixty-six million, four hundred fifty-seven thousand, eight hundred fifty".