66475949 has 4 divisors (see below), whose sum is σ = 67602720. Its totient is φ = 65349180.

The previous prime is 66475931. The next prime is 66475963. The reversal of 66475949 is 94957466.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66475949 - 2⁸ = 66475693 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66475897 and 66475906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66475919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 563297 + ... + 563414.

It is an arithmetic number, because the mean of its divisors is an integer number (16900680).

Almost surely, 2^66475949 is an apocalyptic number.

It is an amenable number.

66475949 is a deficient number, since it is larger than the sum of its proper divisors (1126771).

66475949 is a wasteful number, since it uses less digits than its factorization.

66475949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126770.

The product of its digits is 1632960, while the sum is 50.

The square root of 66475949 is about 8153.2784203656. The cubic root of 66475949 is about 405.0931026113.

The spelling of 66475949 in words is "sixty-six million, four hundred seventy-five thousand, nine hundred forty-nine".