61522666 has 4 divisors (see below), whose sum is σ = 92284002. Its totient is φ = 30761332.

The previous prime is 61522661. The next prime is 61522679. The reversal of 61522666 is 66622516.

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

It can be written as a sum of positive squares in only one way, i.e., 60388441 + 1134225 = 7771^2 + 1065^2 .

It is not an unprimeable number, because it can be changed into a prime (61522661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15380665 + ... + 15380668.

Almost surely, 2^61522666 is an apocalyptic number.

61522666 is a deficient number, since it is larger than the sum of its proper divisors (30761336).

61522666 is a wasteful number, since it uses less digits than its factorization.

61522666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30761335.

The product of its digits is 25920, while the sum is 34.

The square root of 61522666 is about 7843.6385689296. The cubic root of 61522666 is about 394.7708247060.

The spelling of 61522666 in words is "sixty-one million, five hundred twenty-two thousand, six hundred sixty-six".