16664372 has 6 divisors (see below), whose sum is σ = 29162658. Its totient is φ = 8332184.

The previous prime is 16664353. The next prime is 16664377. The reversal of 16664372 is 27346661.

It can be written as a sum of positive squares in only one way, i.e., 15952036 + 712336 = 3994^2 + 844^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16664377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2083043 + ... + 2083050.

It is an arithmetic number, because the mean of its divisors is an integer number (4860443).

Almost surely, 2^16664372 is an apocalyptic number.

It is an amenable number.

16664372 is a deficient number, since it is larger than the sum of its proper divisors (12498286).

16664372 is a wasteful number, since it uses less digits than its factorization.

16664372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4166097 (or 4166095 counting only the distinct ones).

The product of its digits is 36288, while the sum is 35.

The square root of 16664372 is about 4082.2018568415. The cubic root of 16664372 is about 255.4247540951.

The spelling of 16664372 in words is "sixteen million, six hundred sixty-four thousand, three hundred seventy-two".