90669954646 has 4 divisors (see below), whose sum is σ = 136004931972. Its totient is φ = 45334977322.

The previous prime is 90669954619. The next prime is 90669954667. The reversal of 90669954646 is 64645996609.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64645996609 = 134839 ⋅479431.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22667488660 + ... + 22667488663.

It is an arithmetic number, because the mean of its divisors is an integer number (34001232993).

Almost surely, 2^90669954646 is an apocalyptic number.

90669954646 is a deficient number, since it is larger than the sum of its proper divisors (45334977326).

90669954646 is a wasteful number, since it uses less digits than its factorization.

90669954646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45334977325.

The product of its (nonzero) digits is 75582720, while the sum is 64.

The spelling of 90669954646 in words is "ninety billion, six hundred sixty-nine million, nine hundred fifty-four thousand, six hundred forty-six".