66457403 has 16 divisors (see below), whose sum is σ = 72499680. Its totient is φ = 60673536.

The previous prime is 66457399. The next prime is 66457441. The reversal of 66457403 is 30475466.

It is a cyclic number.

It is not a de Polignac number, because 66457403 - 2² = 66457399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66457453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167201 + ... + 167597.

It is an arithmetic number, because the mean of its divisors is an integer number (4531230).

Almost surely, 2^66457403 is an apocalyptic number.

66457403 is a deficient number, since it is larger than the sum of its proper divisors (6042277).

66457403 is a wasteful number, since it uses less digits than its factorization.

66457403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686.

The product of its (nonzero) digits is 60480, while the sum is 35.

The square root of 66457403 is about 8152.1410071220. The cubic root of 66457403 is about 405.0554270531.

The spelling of 66457403 in words is "sixty-six million, four hundred fifty-seven thousand, four hundred three".