75661506 has 16 divisors (see below), whose sum is σ = 168136800. Its totient is φ = 25220484.

The previous prime is 75661471. The next prime is 75661517. The reversal of 75661506 is 60516657.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 700516 + ... + 700623.

It is an arithmetic number, because the mean of its divisors is an integer number (10508550).

Almost surely, 2^75661506 is an apocalyptic number.

75661506 is an abundant number, since it is smaller than the sum of its proper divisors (92475294).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

75661506 is a wasteful number, since it uses less digits than its factorization.

75661506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1401150 (or 1401144 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 75661506 is about 8698.3622596441. The cubic root of 75661506 is about 422.9525624586.

It can be divided in two parts, 75661 and 506, that added together give a palindrome (76167).

The spelling of 75661506 in words is "seventy-five million, six hundred sixty-one thousand, five hundred six".