66763025 has 24 divisors (see below), whose sum is σ = 95065344. Its totient is φ = 45561600.

The previous prime is 66763019. The next prime is 66763027. The reversal of 66763025 is 52036766.

It is not a de Polignac number, because 66763025 - 2⁸ = 66762769 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66763027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41384 + ... + 42966.

It is an arithmetic number, because the mean of its divisors is an integer number (3961056).

Almost surely, 2^66763025 is an apocalyptic number.

It is an amenable number.

66763025 is a deficient number, since it is larger than the sum of its proper divisors (28302319).

66763025 is a wasteful number, since it uses less digits than its factorization.

66763025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1841 (or 1836 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 35.

The square root of 66763025 is about 8170.8643973572. The cubic root of 66763025 is about 405.6753959415.

The spelling of 66763025 in words is "sixty-six million, seven hundred sixty-three thousand, twenty-five".