61540466 has 16 divisors (see below), whose sum is σ = 99587544. Its totient is φ = 28353024.

The previous prime is 61540463. The next prime is 61540469. The reversal of 61540466 is 66404516.

It is an interprime number because it is at equal distance from previous prime (61540463) and next prime (61540469).

It can be written as a sum of positive squares in 4 ways, for example, as 52867441 + 8673025 = 7271^2 + 2945^2 .

It is not an unprimeable number, because it can be changed into a prime (61540463) 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, 15740 + ... + 19256.

Almost surely, 2^61540466 is an apocalyptic number.

61540466 is a deficient number, since it is larger than the sum of its proper divisors (38047078).

61540466 is a wasteful number, since it uses less digits than its factorization.

61540466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4205.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 61540466 is about 7844.7731643432. The cubic root of 61540466 is about 394.8088932942.

The spelling of 61540466 in words is "sixty-one million, five hundred forty thousand, four hundred sixty-six".