66458016 has 48 divisors (see below), whose sum is σ = 193838400. Its totient is φ = 22152384.

The previous prime is 66457999. The next prime is 66458027. The reversal of 66458016 is 61085466.

66458016 is a `hidden beast` number, since 6 + 64 + 580 + 16 = 666.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37596 + ... + 39323.

It is an arithmetic number, because the mean of its divisors is an integer number (4038300).

Almost surely, 2^66458016 is an apocalyptic number.

It is an amenable number.

66458016 is an abundant number, since it is smaller than the sum of its proper divisors (127380384).

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

66458016 is a wasteful number, since it uses less digits than its factorization.

66458016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76938 (or 76924 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 66458016 is about 8152.1786045204. The cubic root of 66458016 is about 405.0566724534.

The spelling of 66458016 in words is "sixty-six million, four hundred fifty-eight thousand, sixteen".