72665703621051 has 32 divisors (see below), whose sum is σ = 98675652556800. Its totient is φ = 47555722905600.

The previous prime is 72665703621037. The next prime is 72665703621143. The reversal of 72665703621051 is 15012630756627.

72665703621051 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 72665703621051 - 2⁴² = 68267657109947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72665703620985 and 72665703621003.

It is not an unprimeable number, because it can be changed into a prime (72665703621031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 330936766 + ... + 331156268.

It is an arithmetic number, because the mean of its divisors is an integer number (3083614142400).

Almost surely, 2^{72665703621051} is an apocalyptic number.

72665703621051 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

72665703621051 is a deficient number, since it is larger than the sum of its proper divisors (26009948935749).

72665703621051 is a wasteful number, since it uses less digits than its factorization.

72665703621051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226267.

The product of its (nonzero) digits is 3175200, while the sum is 51.

The spelling of 72665703621051 in words is "seventy-two trillion, six hundred sixty-five billion, seven hundred three million, six hundred twenty-one thousand, fifty-one".