66603741 has 4 divisors (see below), whose sum is σ = 88804992. Its totient is φ = 44402492.

The previous prime is 66603727. The next prime is 66603787. The reversal of 66603741 is 14730666.

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 66603741 - 2⁵ = 66603709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66603701) 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, 11100621 + ... + 11100626.

It is an arithmetic number, because the mean of its divisors is an integer number (22201248).

Almost surely, 2^66603741 is an apocalyptic number.

It is an amenable number.

66603741 is a deficient number, since it is larger than the sum of its proper divisors (22201251).

66603741 is a wasteful number, since it uses less digits than its factorization.

66603741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22201250.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 66603741 is about 8161.1115051811. Note that the first 3 decimals coincide. The cubic root of 66603741 is about 405.3525173398.

It can be divided in two parts, 6660 and 3741, that added together give a palindrome (10401).

The spelling of 66603741 in words is "sixty-six million, six hundred three thousand, seven hundred forty-one".