53951666 has 4 divisors (see below), whose sum is σ = 80927502. Its totient is φ = 26975832.

The previous prime is 53951663. The next prime is 53951669. The reversal of 53951666 is 66615935.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (53951663) and next prime (53951669).

It can be written as a sum of positive squares in only one way, i.e., 46526041 + 7425625 = 6821^2 + 2725^2 .

It is not an unprimeable number, because it can be changed into a prime (53951663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13487915 + ... + 13487918.

Almost surely, 2^53951666 is an apocalyptic number.

53951666 is a deficient number, since it is larger than the sum of its proper divisors (26975836).

53951666 is a wasteful number, since it uses less digits than its factorization.

53951666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26975835.

The product of its digits is 145800, while the sum is 41.

The square root of 53951666 is about 7345.1797799645. The cubic root of 53951666 is about 377.8635090385.

The spelling of 53951666 in words is "fifty-three million, nine hundred fifty-one thousand, six hundred sixty-six".