66650456 has 8 divisors (see below), whose sum is σ = 124969620. Its totient is φ = 33325224.

The previous prime is 66650453. The next prime is 66650477. The reversal of 66650456 is 65405666.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66650453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4165646 + ... + 4165661.

Almost surely, 2^66650456 is an apocalyptic number.

It is an amenable number.

66650456 is a deficient number, since it is larger than the sum of its proper divisors (58319164).

66650456 is a wasteful number, since it uses less digits than its factorization.

66650456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8331313 (or 8331309 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 38.

The square root of 66650456 is about 8163.9730523808. The cubic root of 66650456 is about 405.4472648576.

The spelling of 66650456 in words is "sixty-six million, six hundred fifty thousand, four hundred fifty-six".