66022061 has 6 divisors (see below), whose sum is σ = 76801230. Its totient is φ = 56590296.

The previous prime is 66022057. The next prime is 66022079. The reversal of 66022061 is 16022066.

It can be written as a sum of positive squares in only one way, i.e., 44222500 + 21799561 = 6650^2 + 4669^2 .

It is not a de Polignac number, because 66022061 - 2² = 66022057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66022051) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 673646 + ... + 673743.

It is an arithmetic number, because the mean of its divisors is an integer number (12800205).

Almost surely, 2^66022061 is an apocalyptic number.

It is an amenable number.

66022061 is a deficient number, since it is larger than the sum of its proper divisors (10779169).

66022061 is a wasteful number, since it uses less digits than its factorization.

66022061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1347403 (or 1347396 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 66022061 is about 8125.3960518857. The cubic root of 66022061 is about 404.1690242160.

The spelling of 66022061 in words is "sixty-six million, twenty-two thousand, sixty-one".