61066990 has 16 divisors (see below), whose sum is σ = 110381040. Its totient is φ = 24324480.

The previous prime is 61066981. The next prime is 61066991. The reversal of 61066990 is 9966016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61066991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10260 + ... + 15079.

It is an arithmetic number, because the mean of its divisors is an integer number (6898815).

Almost surely, 2^61066990 is an apocalyptic number.

61066990 is a deficient number, since it is larger than the sum of its proper divisors (49314050).

61066990 is a wasteful number, since it uses less digits than its factorization.

61066990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25587.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 61066990 is about 7814.5370944158. The cubic root of 61066990 is about 393.7937672017.

It can be divided in two parts, 610 and 66990, that added together give a square (67600 = 260²).

The spelling of 61066990 in words is "sixty-one million, sixty-six thousand, nine hundred ninety".