87651504666 has 48 divisors (see below), whose sum is σ = 207307900800. Its totient is φ = 26544188160.

The previous prime is 87651504587. The next prime is 87651504667. The reversal of 87651504666 is 66640515678.

It is not an unprimeable number, because it can be changed into a prime (87651504667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 173610 + ... + 453258.

It is an arithmetic number, because the mean of its divisors is an integer number (4318914600).

Almost surely, 2^87651504666 is an apocalyptic number.

87651504666 is an abundant number, since it is smaller than the sum of its proper divisors (119656396134).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87651504666 is a wasteful number, since it uses less digits than its factorization.

87651504666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281251 (or 281248 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 54.

The spelling of 87651504666 in words is "eighty-seven billion, six hundred fifty-one million, five hundred four thousand, six hundred sixty-six".