61321766 has 16 divisors (see below), whose sum is σ = 100861200. Its totient is φ = 27730080.

The previous prime is 61321763. The next prime is 61321769. The reversal of 61321766 is 66712316.

It is an interprime number because it is at equal distance from previous prime (61321763) and next prime (61321769).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61321763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2741 + ... + 11408.

It is an arithmetic number, because the mean of its divisors is an integer number (6303825).

Almost surely, 2^61321766 is an apocalyptic number.

61321766 is a deficient number, since it is larger than the sum of its proper divisors (39539434).

61321766 is a wasteful number, since it uses less digits than its factorization.

61321766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14359.

The product of its digits is 9072, while the sum is 32.

The square root of 61321766 is about 7830.8215405537. The cubic root of 61321766 is about 394.3406529327.

The spelling of 61321766 in words is "sixty-one million, three hundred twenty-one thousand, seven hundred sixty-six".