66461456 has 10 divisors (see below), whose sum is σ = 128769102. Its totient is φ = 33230720.

The previous prime is 66461419. The next prime is 66461477. The reversal of 66461456 is 65416466.

It can be written as a sum of positive squares in only one way, i.e., 65286400 + 1175056 = 8080^2 + 1084^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2076905 + ... + 2076936.

Almost surely, 2^66461456 is an apocalyptic number.

It is an amenable number.

66461456 is a deficient number, since it is larger than the sum of its proper divisors (62307646).

66461456 is a wasteful number, since it uses less digits than its factorization.

66461456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4153849 (or 4153843 counting only the distinct ones).

The product of its digits is 103680, while the sum is 38.

The square root of 66461456 is about 8152.3895883354. The cubic root of 66461456 is about 405.0636611810.

The spelling of 66461456 in words is "sixty-six million, four hundred sixty-one thousand, four hundred fifty-six".