52051666 has 16 divisors (see below), whose sum is σ = 81923328. Its totient is φ = 24771600.

The previous prime is 52051633. The next prime is 52051667. The reversal of 52051666 is 66615025.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (52051667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3100 + ... + 10663.

It is an arithmetic number, because the mean of its divisors is an integer number (5120208).

Almost surely, 2^52051666 is an apocalyptic number.

52051666 is a deficient number, since it is larger than the sum of its proper divisors (29871662).

52051666 is a wasteful number, since it uses less digits than its factorization.

52051666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13857.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 52051666 is about 7214.6840540664. The cubic root of 52051666 is about 373.3746926614.

It can be divided in two parts, 5205 and 1666, that multiplied together give a triangular number (8671530 = T₄₁₆₄).

The spelling of 52051666 in words is "fifty-two million, fifty-one thousand, six hundred sixty-six".