66361772 has 6 divisors (see below), whose sum is σ = 116133108. Its totient is φ = 33180884.

The previous prime is 66361759. The next prime is 66361781. The reversal of 66361772 is 27716366.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8295218 + ... + 8295225.

It is an arithmetic number, because the mean of its divisors is an integer number (19355518).

Almost surely, 2^66361772 is an apocalyptic number.

It is an amenable number.

66361772 is a deficient number, since it is larger than the sum of its proper divisors (49771336).

66361772 is a wasteful number, since it uses less digits than its factorization.

66361772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16590447 (or 16590445 counting only the distinct ones).

The product of its digits is 63504, while the sum is 38.

The square root of 66361772 is about 8146.2735038789. The cubic root of 66361772 is about 404.8610446431.

The spelling of 66361772 in words is "sixty-six million, three hundred sixty-one thousand, seven hundred seventy-two".