66360401252 has 24 divisors (see below), whose sum is σ = 118976363352. Its totient is φ = 32367334400.

The previous prime is 66360401189. The next prime is 66360401273. The reversal of 66360401252 is 25210406366.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14929418596 + 51430982656 = 122186^2 + 226784^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2029352 + ... + 2061792.

It is an arithmetic number, because the mean of its divisors is an integer number (4957348473).

Almost surely, 2^66360401252 is an apocalyptic number.

It is an amenable number.

66360401252 is a deficient number, since it is larger than the sum of its proper divisors (52615962100).

66360401252 is a wasteful number, since it uses less digits than its factorization.

66360401252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44959 (or 44957 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 35.

The spelling of 66360401252 in words is "sixty-six billion, three hundred sixty million, four hundred one thousand, two hundred fifty-two".