72579661 has 8 divisors (see below), whose sum is σ = 90489024. Its totient is φ = 56555520.

The previous prime is 72579653. The next prime is 72579673. The reversal of 72579661 is 16697527.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72579661 - 2³ = 72579653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72579641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 471220 + ... + 471373.

It is an arithmetic number, because the mean of its divisors is an integer number (11311128).

Almost surely, 2^72579661 is an apocalyptic number.

It is an amenable number.

72579661 is a deficient number, since it is larger than the sum of its proper divisors (17909363).

72579661 is a wasteful number, since it uses less digits than its factorization.

72579661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942611.

The product of its digits is 158760, while the sum is 43.

The square root of 72579661 is about 8519.3697536848. The cubic root of 72579661 is about 417.1302110105.

The spelling of 72579661 in words is "seventy-two million, five hundred seventy-nine thousand, six hundred sixty-one".