76661201 has 8 divisors (see below), whose sum is σ = 78061224. Its totient is φ = 75265920.

The previous prime is 76661191. The next prime is 76661203. The reversal of 76661201 is 10216667.

It can be written as a sum of positive squares in 4 ways, for example, as 15054400 + 61606801 = 3880^2 + 7849^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-76661201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76661203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52781 + ... + 54213.

It is an arithmetic number, because the mean of its divisors is an integer number (9757653).

Almost surely, 2^76661201 is an apocalyptic number.

It is an amenable number.

76661201 is a deficient number, since it is larger than the sum of its proper divisors (1400023).

76661201 is a wasteful number, since it uses less digits than its factorization.

76661201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2371.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 76661201 is about 8755.6382405853. The cubic root of 76661201 is about 424.8072039031.

Adding to 76661201 its reverse (10216667), we get a palindrome (86877868).

The spelling of 76661201 in words is "seventy-six million, six hundred sixty-one thousand, two hundred one".