16660953 has 6 divisors (see below), whose sum is σ = 24065834. Its totient is φ = 11107296.

The previous prime is 16660939. The next prime is 16660961. The reversal of 16660953 is 35906661.

It can be written as a sum of positive squares in only one way, i.e., 15468489 + 1192464 = 3933^2 + 1092^2 .

It is a de Polignac number, because none of the positive numbers 2^k-16660953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16660913) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 925600 + ... + 925617.

Almost surely, 2^16660953 is an apocalyptic number.

It is an amenable number.

16660953 is a deficient number, since it is larger than the sum of its proper divisors (7404881).

16660953 is a wasteful number, since it uses less digits than its factorization.

16660953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1851223 (or 1851220 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 16660953 is about 4081.7830662592. The cubic root of 16660953 is about 255.4072845506.

It can be divided in two parts, 16 and 660953, that added together give a square (660969 = 813²).

The spelling of 16660953 in words is "sixteen million, six hundred sixty thousand, nine hundred fifty-three".