81466052 has 6 divisors (see below), whose sum is σ = 142565598. Its totient is φ = 40733024.

The previous prime is 81466019. The next prime is 81466067. The reversal of 81466052 is 25066418.

It can be written as a sum of positive squares in only one way, i.e., 61089856 + 20376196 = 7816^2 + 4514^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10183253 + ... + 10183260.

It is an arithmetic number, because the mean of its divisors is an integer number (23760933).

Almost surely, 2^81466052 is an apocalyptic number.

It is an amenable number.

81466052 is a deficient number, since it is larger than the sum of its proper divisors (61099546).

81466052 is a wasteful number, since it uses less digits than its factorization.

81466052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20366517 (or 20366515 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 81466052 is about 9025.8546409744. The cubic root of 81466052 is about 433.5031158495.

It can be divided in two parts, 814 and 66052, that added together give a palindrome (66866).

The spelling of 81466052 in words is "eighty-one million, four hundred sixty-six thousand, fifty-two".