72300661 has 8 divisors (see below), whose sum is σ = 75680064. Its totient is φ = 68940960.

The previous prime is 72300659. The next prime is 72300667. The reversal of 72300661 is 16600327.

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

It is a cyclic number.

It is not a de Polignac number, because 72300661 - 2¹ = 72300659 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 (72300667) 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, 2865 + ... + 12361.

It is an arithmetic number, because the mean of its divisors is an integer number (9460008).

Almost surely, 2^72300661 is an apocalyptic number.

It is an amenable number.

72300661 is a deficient number, since it is larger than the sum of its proper divisors (3379403).

72300661 is a wasteful number, since it uses less digits than its factorization.

72300661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9851.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 72300661 is about 8502.9795366095. The cubic root of 72300661 is about 416.5950345837.

Adding to 72300661 its reverse (16600327), we get a palindrome (88900988).

The spelling of 72300661 in words is "seventy-two million, three hundred thousand, six hundred sixty-one".