66501456 has 40 divisors (see below), whose sum is σ = 196338624. Its totient is φ = 19000320.

The previous prime is 66501451. The next prime is 66501473. The reversal of 66501456 is 65410566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66501451) 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, 98625 + ... + 99296.

Almost surely, 2^66501456 is an apocalyptic number.

It is an amenable number.

66501456 is an abundant number, since it is smaller than the sum of its proper divisors (129837168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66501456 is a wasteful number, since it uses less digits than its factorization.

66501456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197939 (or 197933 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 66501456 is about 8154.8424877492. The cubic root of 66501456 is about 405.1449077561.

The spelling of 66501456 in words is "sixty-six million, five hundred one thousand, four hundred fifty-six".