87667148195761 has 4 divisors (see below), whose sum is σ = 87667235908452. Its totient is φ = 87667060483072.

The previous prime is 87667148195749. The next prime is 87667148195789. The reversal of 87667148195761 is 16759184176678.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 56629101603361 + 31038046592400 = 7525231^2 + 5571180^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87667148195761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87667148195701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42339640 + ... + 44361913.

It is an arithmetic number, because the mean of its divisors is an integer number (21916808977113).

Almost surely, 2^{87667148195761} is an apocalyptic number.

It is an amenable number.

87667148195761 is a deficient number, since it is larger than the sum of its proper divisors (87712691).

87667148195761 is a wasteful number, since it uses less digits than its factorization.

87667148195761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87712690.

The product of its digits is 853493760, while the sum is 76.

The spelling of 87667148195761 in words is "eighty-seven trillion, six hundred sixty-seven billion, one hundred forty-eight million, one hundred ninety-five thousand, seven hundred sixty-one".