69661672 has 16 divisors (see below), whose sum is σ = 131494500. Its totient is φ = 34596480.

The previous prime is 69661643. The next prime is 69661673. The reversal of 69661672 is 27616696.

It can be written as a sum of positive squares in 2 ways, for example, as 69455556 + 206116 = 8334^2 + 454^2 .

It is not an unprimeable number, because it can be changed into a prime (69661673) 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, 28029 + ... + 30412.

Almost surely, 2^69661672 is an apocalyptic number.

It is an amenable number.

69661672 is a deficient number, since it is larger than the sum of its proper divisors (61832828).

69661672 is a wasteful number, since it uses less digits than its factorization.

69661672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58596 (or 58592 counting only the distinct ones).

The product of its digits is 163296, while the sum is 43.

The square root of 69661672 is about 8346.3568100100. The cubic root of 69661672 is about 411.4634829925.

The spelling of 69661672 in words is "sixty-nine million, six hundred sixty-one thousand, six hundred seventy-two".