66453516 has 18 divisors (see below), whose sum is σ = 167979812. Its totient is φ = 22151160.

The previous prime is 66453479. The next prime is 66453521. The reversal of 66453516 is 61535466.

66453516 is a `hidden beast` number, since 6 + 645 + 3 + 5 + 1 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1845931 = 66453516 / (6 + 6 + 4 + 5 + 3 + 5 + 1 + 6).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 922930 + ... + 923001.

Almost surely, 2^66453516 is an apocalyptic number.

It is an amenable number.

66453516 is an abundant number, since it is smaller than the sum of its proper divisors (101526296).

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

66453516 is a wasteful number, since it uses less digits than its factorization.

66453516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1845941 (or 1845936 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 66453516 is about 8151.9026000069. The cubic root of 66453516 is about 405.0475298585.

The spelling of 66453516 in words is "sixty-six million, four hundred fifty-three thousand, five hundred sixteen".