61918066 has 12 divisors (see below), whose sum is σ = 108040878. Its totient is φ = 26536272.

The previous prime is 61918061. The next prime is 61918079. The reversal of 61918066 is 66081916.

It can be written as a sum of positive squares in only one way, i.e., 41024025 + 20894041 = 6405^2 + 4571^2 .

It is not an unprimeable number, because it can be changed into a prime (61918061) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 315811 + ... + 316006.

Almost surely, 2^61918066 is an apocalyptic number.

61918066 is a deficient number, since it is larger than the sum of its proper divisors (46122812).

61918066 is a wasteful number, since it uses less digits than its factorization.

61918066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631833 (or 631826 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 61918066 is about 7868.8033397716. The cubic root of 61918066 is about 395.6147368574.

The spelling of 61918066 in words is "sixty-one million, nine hundred eighteen thousand, sixty-six".