66190481 has 16 divisors (see below), whose sum is σ = 80434944. Its totient is φ = 53237184.

The previous prime is 66190417. The next prime is 66190483. The reversal of 66190481 is 18409166.

It is not a de Polignac number, because 66190481 - 2⁶ = 66190417 is a prime.

It is a super-2 number, since 2×66190481² = 8762359550022722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66190483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4655 + ... + 12411.

It is an arithmetic number, because the mean of its divisors is an integer number (5027184).

Almost surely, 2^66190481 is an apocalyptic number.

It is an amenable number.

66190481 is a deficient number, since it is larger than the sum of its proper divisors (14244463).

66190481 is a wasteful number, since it uses less digits than its factorization.

66190481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7840.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 66190481 is about 8135.7532533872. The cubic root of 66190481 is about 404.5124061421.

The spelling of 66190481 in words is "sixty-six million, one hundred ninety thousand, four hundred eighty-one".