61066457 has 4 divisors (see below), whose sum is σ = 61179876. Its totient is φ = 60953040.

The previous prime is 61066451. The next prime is 61066463. The reversal of 61066457 is 75466016.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (61066451) and next prime (61066463).

It can be written as a sum of positive squares in 2 ways, for example, as 10883401 + 50183056 = 3299^2 + 7084^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61066457 is a prime.

It is a super-2 number, since 2×61066457² = 7458224341065698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61066451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55898 + ... + 56979.

It is an arithmetic number, because the mean of its divisors is an integer number (15294969).

Almost surely, 2^61066457 is an apocalyptic number.

It is an amenable number.

61066457 is a deficient number, since it is larger than the sum of its proper divisors (113419).

61066457 is a wasteful number, since it uses less digits than its factorization.

61066457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113418.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 61066457 is about 7814.5029912337. The cubic root of 61066457 is about 393.7926215054.

The spelling of 61066457 in words is "sixty-one million, sixty-six thousand, four hundred fifty-seven".