87066990 has 48 divisors (see below), whose sum is σ = 234187200. Its totient is φ = 22416576.

The previous prime is 87066929. The next prime is 87066997. The reversal of 87066990 is 9966078.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87066997) 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, 14070 + ... + 19289.

It is an arithmetic number, because the mean of its divisors is an integer number (4878900).

Almost surely, 2^87066990 is an apocalyptic number.

87066990 is an abundant number, since it is smaller than the sum of its proper divisors (147120210).

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

87066990 is a wasteful number, since it uses less digits than its factorization.

87066990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33401 (or 33398 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 87066990 is about 9330.9694030149. The cubic root of 87066990 is about 443.2184632134.

The spelling of 87066990 in words is "eighty-seven million, sixty-six thousand, nine hundred ninety".