76661520828135 has 64 divisors (see below), whose sum is σ = 127935209147904. Its totient is φ = 39162391488000.

The previous prime is 76661520828133. The next prime is 76661520828157. The reversal of 76661520828135 is 53182802516667.

It is not a de Polignac number, because 76661520828135 - 2¹ = 76661520828133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76661520828133) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 57761485 + ... + 59073785.

It is an arithmetic number, because the mean of its divisors is an integer number (1998987642936).

Almost surely, 2^{76661520828135} is an apocalyptic number.

76661520828135 is a deficient number, since it is larger than the sum of its proper divisors (51273688319769).

76661520828135 is a wasteful number, since it uses less digits than its factorization.

76661520828135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1313984.

The product of its (nonzero) digits is 29030400, while the sum is 60.

The spelling of 76661520828135 in words is "seventy-six trillion, six hundred sixty-one billion, five hundred twenty million, eight hundred twenty-eight thousand, one hundred thirty-five".