90667690 has 16 divisors (see below), whose sum is σ = 163311840. Its totient is φ = 36242640.

The previous prime is 90667673. The next prime is 90667699. The reversal of 90667690 is 9676609.

It is a happy number.

It is a super-2 number, since 2×90667690² = 16441260019872200, which contains 22 as substring.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (90667699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23605 + ... + 27175.

It is an arithmetic number, because the mean of its divisors is an integer number (10206990).

Almost surely, 2^90667690 is an apocalyptic number.

90667690 is a deficient number, since it is larger than the sum of its proper divisors (72644150).

90667690 is a wasteful number, since it uses less digits than its factorization.

90667690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6117.

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 90667690 is about 9521.9583069871. The cubic root of 90667690 is about 449.2459635521.

The spelling of 90667690 in words is "ninety million, six hundred sixty-seven thousand, six hundred ninety".