90050661 has 6 divisors (see below), whose sum is σ = 130073190. Its totient is φ = 60033768.

The previous prime is 90050651. The next prime is 90050687. The reversal of 90050661 is 16605009.

It can be written as a sum of positive squares in only one way, i.e., 79121025 + 10929636 = 8895^2 + 3306^2 .

It is not a de Polignac number, because 90050661 - 2¹¹ = 90048613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90050621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5002806 + ... + 5002823.

It is an arithmetic number, because the mean of its divisors is an integer number (21678865).

Almost surely, 2^90050661 is an apocalyptic number.

It is an amenable number.

90050661 is a deficient number, since it is larger than the sum of its proper divisors (40022529).

90050661 is a wasteful number, since it uses less digits than its factorization.

90050661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10005635 (or 10005632 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 90050661 is about 9489.5026740077. The cubic root of 90050661 is about 448.2245449744.

The spelling of 90050661 in words is "ninety million, fifty thousand, six hundred sixty-one".