66457733 has 4 divisors (see below), whose sum is σ = 66710688. Its totient is φ = 66204780.

The previous prime is 66457693. The next prime is 66457751. The reversal of 66457733 is 33775466.

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, and also an emirpimes, since its reverse is a distinct semiprime: 33775466 = 2 ⋅16887733.

It is a cyclic number.

It is not a de Polignac number, because 66457733 - 2¹⁸ = 66195589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66457033) 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, 126083 + ... + 126608.

It is an arithmetic number, because the mean of its divisors is an integer number (16677672).

Almost surely, 2^66457733 is an apocalyptic number.

It is an amenable number.

66457733 is a deficient number, since it is larger than the sum of its proper divisors (252955).

66457733 is a wasteful number, since it uses less digits than its factorization.

66457733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252954.

The product of its digits is 317520, while the sum is 41.

The square root of 66457733 is about 8152.1612471786. The cubic root of 66457733 is about 405.0560974980.

The spelling of 66457733 in words is "sixty-six million, four hundred fifty-seven thousand, seven hundred thirty-three".