90985648066 has 24 divisors (see below), whose sum is σ = 143711930124. Its totient is φ = 43197179520.

The previous prime is 90985648037. The next prime is 90985648079. The reversal of 90985648066 is 66084658909.

It can be written as a sum of positive squares in 2 ways, for example, as 84960007441 + 6025640625 = 291479^2 + 77625^2 .

It is a super-3 number, since 3×90985648066³ (a number of 34 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 90985647995 and 90985648013.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 168915 + ... + 458806.

Almost surely, 2^90985648066 is an apocalyptic number.

90985648066 is a deficient number, since it is larger than the sum of its proper divisors (52726282058).

90985648066 is a wasteful number, since it uses less digits than its factorization.

90985648066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627906 (or 627883 counting only the distinct ones).

The product of its (nonzero) digits is 22394880, while the sum is 61.

The spelling of 90985648066 in words is "ninety billion, nine hundred eighty-five million, six hundred forty-eight thousand, sixty-six".