75611977 has 4 divisors (see below), whose sum is σ = 86413696. Its totient is φ = 64810260.

The previous prime is 75611957. The next prime is 75611989. The reversal of 75611977 is 77911657.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 77911657 = 43 ⋅1811899.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75611977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75611917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5400849 + ... + 5400862.

It is an arithmetic number, because the mean of its divisors is an integer number (21603424).

Almost surely, 2^75611977 is an apocalyptic number.

It is an amenable number.

75611977 is a deficient number, since it is larger than the sum of its proper divisors (10801719).

75611977 is a wasteful number, since it uses less digits than its factorization.

75611977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10801718.

The product of its digits is 92610, while the sum is 43.

The square root of 75611977 is about 8695.5147633708. The cubic root of 75611977 is about 422.8602522413.

The spelling of 75611977 in words is "seventy-five million, six hundred eleven thousand, nine hundred seventy-seven".