61511066 has 8 divisors (see below), whose sum is σ = 97694100. Its totient is φ = 28946368.

The previous prime is 61511033. The next prime is 61511071. The reversal of 61511066 is 66011516.

It can be written as a sum of positive squares in 2 ways, for example, as 58967041 + 2544025 = 7679^2 + 1595^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×61511066² = 7567222480912712, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 904541 + ... + 904608.

Almost surely, 2^61511066 is an apocalyptic number.

61511066 is a deficient number, since it is larger than the sum of its proper divisors (36183034).

61511066 is a wasteful number, since it uses less digits than its factorization.

61511066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1809168.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 61511066 is about 7842.8990813347. The cubic root of 61511066 is about 394.7460120112.

The spelling of 61511066 in words is "sixty-one million, five hundred eleven thousand, sixty-six".