87866380690 has 32 divisors (see below), whose sum is σ = 173278175616. Its totient is φ = 31814271360.

The previous prime is 87866380649. The next prime is 87866380699. The reversal of 87866380690 is 9608366878.

It is a super-2 number, since 2×87866380690² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87866380699) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1688502 + ... + 1739761.

It is an arithmetic number, because the mean of its divisors is an integer number (5414942988).

Almost surely, 2^87866380690 is an apocalyptic number.

87866380690 is a deficient number, since it is larger than the sum of its proper divisors (85411794926).

87866380690 is a wasteful number, since it uses less digits than its factorization.

87866380690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3428514.

The product of its (nonzero) digits is 20901888, while the sum is 61.

The spelling of 87866380690 in words is "eighty-seven billion, eight hundred sixty-six million, three hundred eighty thousand, six hundred ninety".