45666778 has 8 divisors (see below), whose sum is σ = 68659668. Its totient is φ = 22780224.

The previous prime is 45666773. The next prime is 45666781. The reversal of 45666778 is 87766654.

It can be written as a sum of positive squares in 2 ways, for example, as 39727809 + 5938969 = 6303^2 + 2437^2 .

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

It is a super-2 number, since 2×45666778² = 4170909225802568, which contains 22 as substring.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (45666773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25501 + ... + 27232.

Almost surely, 2^45666778 is an apocalyptic number.

45666778 is a deficient number, since it is larger than the sum of its proper divisors (22992890).

45666778 is a wasteful number, since it uses less digits than its factorization.

45666778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53168.

The product of its digits is 1693440, while the sum is 49.

The square root of 45666778 is about 6757.7198817353. The cubic root of 45666778 is about 357.4375081080.

The spelling of 45666778 in words is "forty-five million, six hundred sixty-six thousand, seven hundred seventy-eight".