66312692 has 24 divisors (see below), whose sum is σ = 117857544. Its totient is φ = 32643072.

The previous prime is 66312691. The next prime is 66312713. The reversal of 66312692 is 29621366.

It can be written as a sum of positive squares in 4 ways, for example, as 929296 + 65383396 = 964^2 + 8086^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66312691) 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, 107168 + ... + 107784.

It is an arithmetic number, because the mean of its divisors is an integer number (4910731).

Almost surely, 2^66312692 is an apocalyptic number.

It is an amenable number.

66312692 is a deficient number, since it is larger than the sum of its proper divisors (51544852).

66312692 is a wasteful number, since it uses less digits than its factorization.

66312692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995 (or 993 counting only the distinct ones).

The product of its digits is 23328, while the sum is 35.

The square root of 66312692 is about 8143.2605263494. The cubic root of 66312692 is about 404.7612106567.

The spelling of 66312692 in words is "sixty-six million, three hundred twelve thousand, six hundred ninety-two".