65551290 has 64 divisors (see below), whose sum is σ = 180596736. Its totient is φ = 14916672.

The previous prime is 65551289. The next prime is 65551319. The reversal of 65551290 is 9215556.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58879 + ... + 59981.

It is an arithmetic number, because the mean of its divisors is an integer number (2821824).

Almost surely, 2^65551290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65551290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90298368).

65551290 is an abundant number, since it is smaller than the sum of its proper divisors (115045446).

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

65551290 is a wasteful number, since it uses less digits than its factorization.

65551290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1403.

The product of its (nonzero) digits is 13500, while the sum is 33.

The square root of 65551290 is about 8096.3751148276. The cubic root of 65551290 is about 403.2060880088.

The spelling of 65551290 in words is "sixty-five million, five hundred fifty-one thousand, two hundred ninety".