66253061 has 4 divisors (see below), whose sum is σ = 75717792. Its totient is φ = 56788332.

The previous prime is 66253043. The next prime is 66253079. The reversal of 66253061 is 16035266.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (66253043) and next prime (66253079).

It is a cyclic number.

It is not a de Polignac number, because 66253061 - 2⁶ = 66252997 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 (66253001) 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, 4732355 + ... + 4732368.

It is an arithmetic number, because the mean of its divisors is an integer number (18929448).

Almost surely, 2^66253061 is an apocalyptic number.

It is an amenable number.

66253061 is a deficient number, since it is larger than the sum of its proper divisors (9464731).

66253061 is an equidigital number, since it uses as much as digits as its factorization.

66253061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9464730.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 66253061 is about 8139.5983316132. The cubic root of 66253061 is about 404.6398484990.

The spelling of 66253061 in words is "sixty-six million, two hundred fifty-three thousand, sixty-one".