79661746 has 4 divisors (see below), whose sum is σ = 119492622. Its totient is φ = 39830872.

The previous prime is 79661713. The next prime is 79661749. The reversal of 79661746 is 64716697.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 59059225 + 20602521 = 7685^2 + 4539^2 .

It is a junction number, because it is equal to n+sod(n) for n = 79661696 and 79661705.

It is not an unprimeable number, because it can be changed into a prime (79661749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19915435 + ... + 19915438.

Almost surely, 2^79661746 is an apocalyptic number.

79661746 is a deficient number, since it is larger than the sum of its proper divisors (39830876).

79661746 is a wasteful number, since it uses less digits than its factorization.

79661746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39830875.

The product of its digits is 381024, while the sum is 46.

The square root of 79661746 is about 8925.3429065779. The cubic root of 79661746 is about 430.2787916232.

It can be divided in two parts, 79 and 661746, that added together give a triangular number (661825 = T₁₁₅₀).

The spelling of 79661746 in words is "seventy-nine million, six hundred sixty-one thousand, seven hundred forty-six".