66481151 has 6 divisors (see below), whose sum is σ = 73074456. Its totient is φ = 60437300.

The previous prime is 66481147. The next prime is 66481159. The reversal of 66481151 is 15118466.

It is not a de Polignac number, because 66481151 - 2² = 66481147 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66481159) 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, 274595 + ... + 274836.

It is an arithmetic number, because the mean of its divisors is an integer number (12179076).

Almost surely, 2^66481151 is an apocalyptic number.

66481151 is a deficient number, since it is larger than the sum of its proper divisors (6593305).

66481151 is a wasteful number, since it uses less digits than its factorization.

66481151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549453 (or 549442 counting only the distinct ones).

The product of its digits is 5760, while the sum is 32.

The square root of 66481151 is about 8153.5974269030. The cubic root of 66481151 is about 405.1036690361.

The spelling of 66481151 in words is "sixty-six million, four hundred eighty-one thousand, one hundred fifty-one".