76520561 has 8 divisors (see below), whose sum is σ = 82475904. Its totient is φ = 70575120.

The previous prime is 76520557. The next prime is 76520567. The reversal of 76520561 is 16502567.

It is a happy number.

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 76520561 - 2² = 76520557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76520567) 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, 24680 + ... + 27606.

It is an arithmetic number, because the mean of its divisors is an integer number (10309488).

Almost surely, 2^76520561 is an apocalyptic number.

It is an amenable number.

76520561 is a deficient number, since it is larger than the sum of its proper divisors (5955343).

76520561 is a wasteful number, since it uses less digits than its factorization.

76520561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4951.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 76520561 is about 8747.6031574369. The cubic root of 76520561 is about 424.5472659903.

The spelling of 76520561 in words is "seventy-six million, five hundred twenty thousand, five hundred sixty-one".