66670016 has 28 divisors (see below), whose sum is σ = 151199088. Its totient is φ = 28572672.

The previous prime is 66670013. The next prime is 66670033. The reversal of 66670016 is 61007666.

It is a tau number, because it is divible by the number of its divisors (28).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66670013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73961 + ... + 74856.

Almost surely, 2^66670016 is an apocalyptic number.

It is an amenable number.

66670016 is an abundant number, since it is smaller than the sum of its proper divisors (84529072).

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

66670016 is a wasteful number, since it uses less digits than its factorization.

66670016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148836 (or 148826 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 66670016 is about 8165.1709106423. The cubic root of 66670016 is about 405.4869233651.

The spelling of 66670016 in words is "sixty-six million, six hundred seventy thousand, sixteen".