66731248 has 10 divisors (see below), whose sum is σ = 129291824. Its totient is φ = 33365616.

The previous prime is 66731237. The next prime is 66731297. The reversal of 66731248 is 84213766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2085336 + ... + 2085367.

Almost surely, 2^66731248 is an apocalyptic number.

It is an amenable number.

66731248 is a deficient number, since it is larger than the sum of its proper divisors (62560576).

66731248 is a wasteful number, since it uses less digits than its factorization.

66731248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4170711 (or 4170705 counting only the distinct ones).

The product of its digits is 48384, while the sum is 37.

The square root of 66731248 is about 8168.9196348110. The cubic root of 66731248 is about 405.6110230202.

It can be divided in two parts, 6673 and 1248, that added together give a square (7921 = 89²).

The spelling of 66731248 in words is "sixty-six million, seven hundred thirty-one thousand, two hundred forty-eight".