66634461 has 8 divisors (see below), whose sum is σ = 98717760. Its totient is φ = 44422956.

The previous prime is 66634459. The next prime is 66634481. The reversal of 66634461 is 16443666.

It is not a de Polignac number, because 66634461 - 2¹ = 66634459 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66634481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1233945 + ... + 1233998.

It is an arithmetic number, because the mean of its divisors is an integer number (12339720).

Almost surely, 2^66634461 is an apocalyptic number.

It is an amenable number.

66634461 is a deficient number, since it is larger than the sum of its proper divisors (32083299).

66634461 is a wasteful number, since it uses less digits than its factorization.

66634461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2467952 (or 2467946 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

The square root of 66634461 is about 8162.9933847823. The cubic root of 66634461 is about 405.4148287312.

The spelling of 66634461 in words is "sixty-six million, six hundred thirty-four thousand, four hundred sixty-one".