56981066 has 4 divisors (see below), whose sum is σ = 85471602. Its totient is φ = 28490532.

The previous prime is 56981053. The next prime is 56981117. The reversal of 56981066 is 66018965.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66018965 = 5 ⋅13203793.

It can be written as a sum of positive squares in only one way, i.e., 48011041 + 8970025 = 6929^2 + 2995^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14245265 + ... + 14245268.

Almost surely, 2^56981066 is an apocalyptic number.

56981066 is a deficient number, since it is larger than the sum of its proper divisors (28490536).

56981066 is a wasteful number, since it uses less digits than its factorization.

56981066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28490535.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 56981066 is about 7548.5803963394. The cubic root of 56981066 is about 384.8074958235.

The spelling of 56981066 in words is "fifty-six million, nine hundred eighty-one thousand, sixty-six".