61725566 has 16 divisors (see below), whose sum is σ = 111384960. Its totient is φ = 25061400.

The previous prime is 61725563. The next prime is 61725569. The reversal of 61725566 is 66552716.

It is an interprime number because it is at equal distance from previous prime (61725563) and next prime (61725569).

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61725563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115760 + ... + 116291.

It is an arithmetic number, because the mean of its divisors is an integer number (6961560).

Almost surely, 2^61725566 is an apocalyptic number.

61725566 is a deficient number, since it is larger than the sum of its proper divisors (49659394).

61725566 is a wasteful number, since it uses less digits than its factorization.

61725566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232079.

The product of its digits is 75600, while the sum is 38.

The square root of 61725566 is about 7856.5619707350. The cubic root of 61725566 is about 395.2043294709.

The spelling of 61725566 in words is "sixty-one million, seven hundred twenty-five thousand, five hundred sixty-six".