66022864 has 10 divisors (see below), whose sum is σ = 127919330. Its totient is φ = 33011424.

The previous prime is 66022861. The next prime is 66022877. The reversal of 66022864 is 46822066.

It can be written as a sum of positive squares in only one way, i.e., 46131264 + 19891600 = 6792^2 + 4460^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66022861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2063199 + ... + 2063230.

It is an arithmetic number, because the mean of its divisors is an integer number (12791933).

Almost surely, 2^66022864 is an apocalyptic number.

It is an amenable number.

66022864 is a deficient number, since it is larger than the sum of its proper divisors (61896466).

66022864 is a wasteful number, since it uses less digits than its factorization.

66022864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4126437 (or 4126431 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 66022864 is about 8125.4454647115. The cubic root of 66022864 is about 404.1706627916.

The spelling of 66022864 in words is "sixty-six million, twenty-two thousand, eight hundred sixty-four".