90066780 has 72 divisors (see below), whose sum is σ = 282033024. Its totient is φ = 23241600.

The previous prime is 90066751. The next prime is 90066787. The reversal of 90066780 is 8766009.

It is a super-2 number, since 2×90066780² = 16224049719136800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90066787) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2491 + ... + 13650.

Almost surely, 2^90066780 is an apocalyptic number.

90066780 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90066780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141016512).

90066780 is an abundant number, since it is smaller than the sum of its proper divisors (191966244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

90066780 is a wasteful number, since it uses less digits than its factorization.

90066780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16187 (or 16182 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 90066780 is about 9490.3519428944. The cubic root of 90066780 is about 448.2512873300.

The spelling of 90066780 in words is "ninety million, sixty-six thousand, seven hundred eighty".