72077751 has 12 divisors (see below), whose sum is σ = 104696280. Its totient is φ = 47782320.

The previous prime is 72077749. The next prime is 72077833. The reversal of 72077751 is 15777027.

It is a happy number.

It is not a de Polignac number, because 72077751 - 2¹ = 72077749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72077251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20760 + ... + 23981.

It is an arithmetic number, because the mean of its divisors is an integer number (8724690).

Almost surely, 2^72077751 is an apocalyptic number.

72077751 is a deficient number, since it is larger than the sum of its proper divisors (32618529).

72077751 is a wasteful number, since it uses less digits than its factorization.

72077751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44926 (or 44923 counting only the distinct ones).

The product of its (nonzero) digits is 24010, while the sum is 36.

The square root of 72077751 is about 8489.8616596503. The cubic root of 72077751 is about 416.1664594406.

The spelling of 72077751 in words is "seventy-two million, seventy-seven thousand, seven hundred fifty-one".