53966690 has 8 divisors (see below), whose sum is σ = 97140060. Its totient is φ = 21586672.

The previous prime is 53966641. The next prime is 53966711. The reversal of 53966690 is 9666935.

It can be written as a sum of positive squares in 2 ways, for example, as 52258441 + 1708249 = 7229^2 + 1307^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×53966690² = 5824807259112200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2698325 + ... + 2698344.

Almost surely, 2^53966690 is an apocalyptic number.

53966690 is a deficient number, since it is larger than the sum of its proper divisors (43173370).

53966690 is a wasteful number, since it uses less digits than its factorization.

53966690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5396676.

The product of its (nonzero) digits is 262440, while the sum is 44.

The square root of 53966690 is about 7346.2024202985. The cubic root of 53966690 is about 377.8985805194.

The spelling of 53966690 in words is "fifty-three million, nine hundred sixty-six thousand, six hundred ninety".