90542666 has 8 divisors (see below), whose sum is σ = 138040644. Its totient is φ = 44529120.

The previous prime is 90542653. The next prime is 90542671. The reversal of 90542666 is 66624509.

It can be written as a sum of positive squares in 2 ways, for example, as 83631025 + 6911641 = 9145^2 + 2629^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 370955 + ... + 371198.

Almost surely, 2^90542666 is an apocalyptic number.

90542666 is a deficient number, since it is larger than the sum of its proper divisors (47497978).

90542666 is a wasteful number, since it uses less digits than its factorization.

90542666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742216.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 90542666 is about 9515.3910061542. The cubic root of 90542666 is about 449.0393763117.

The spelling of 90542666 in words is "ninety million, five hundred forty-two thousand, six hundred sixty-six".