366777621504 has 1056 divisors, whose sum is σ = 1321881200640. Its totient is φ = 99409379328.

The previous prime is 366777621437. The next prime is 366777621533. The reversal of 366777621504 is 405126777663.

It is a happy number.

366777621504 is a `hidden beast` number, since 3 + 6 + 6 + 7 + 7 + 7 + 621 + 5 + 0 + 4 = 666.

It is a super-2 number, since 2×366777621504² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4419007447 + ... + 4419007529.

It is an arithmetic number, because the mean of its divisors is an integer number (1251781440).

Almost surely, 2^366777621504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 366777621504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (660940600320).

366777621504 is an abundant number, since it is smaller than the sum of its proper divisors (955103579136).

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

366777621504 is an equidigital number, since it uses as much as digits as its factorization.

366777621504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 8890560, while the sum is 54.

The spelling of 366777621504 in words is "three hundred sixty-six billion, seven hundred seventy-seven million, six hundred twenty-one thousand, five hundred four".