66037447 has 8 divisors (see below), whose sum is σ = 77012000. Its totient is φ = 56603232.

The previous prime is 66037427. The next prime is 66037451. The reversal of 66037447 is 74473066.

It is a de Polignac number, because none of the positive numbers 2^k-66037447 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 (66037427) 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, 95922 + ... + 96607.

It is an arithmetic number, because the mean of its divisors is an integer number (9626500).

Almost surely, 2^66037447 is an apocalyptic number.

66037447 is a deficient number, since it is larger than the sum of its proper divisors (10974553).

66037447 is an equidigital number, since it uses as much as digits as its factorization.

66037447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192550 (or 192536 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 37.

The square root of 66037447 is about 8126.3427813500. The cubic root of 66037447 is about 404.2004180739.

The spelling of 66037447 in words is "sixty-six million, thirty-seven thousand, four hundred forty-seven".